Glass hot bending forming structure

Abstract

The utility model discloses a glass hot bending forming structure, which adopts a split type design, can realize multi-stage forming of products in the same mold, improves the production efficiency and yield of the products, reduces the production cost and reduces the energy waste, and comprises a lower mold, an upper mold, an annular flanging insert, a groove insert, a heating plate suspended above the upper mold, and a driving unit, a cavity is formed in the upper surface of the lower mold; the upper die is located above the lower die and abuts against the upper surface of the glass sheet. The annular flanging insert is arranged around the upper die and corresponds to the edge of a glass sheet, and the upper surface of the annular flanging insert is lower than the upper surface of the upper die; the groove insert is fixed on the upper die, and the lower surface of the groove insert corresponds to the middle part of the glass sheet; the driving unit comprises a first driving assembly used for driving the heating plate to ascend and descend so as to enable the heating plate to extrude the upper die and the groove insert and enable the middle of the glass sheet to be bent and formed, and a second driving assembly at least used for driving the annular edge bending insert to ascend and descend so as to enable the edge of the glass sheet to be bent and formed.

Description

Technical Field

[0001] This utility model relates to the field of glass hot bending processing technology, and in particular to a glass hot bending forming structure. Background Technology

[0002] For 3D curved glass, especially large-sized curved glass with multiple continuous bends, the glass sheet is often heated during processing to soften it, and then shaped using a mold to achieve hot bending. Currently, the industry mainly uses a hot bending forming machine for multiple pressing operations when processing glass with multiple continuous bends. A hot bending forming machine generally includes a preheating zone, a forming zone, a slow cooling zone, and an external cooling zone. The machine uses cylinders and heating plates to heat and pressurize the mold to form the product. The forming zone of the hot bending forming machine is generally divided into three stations. When the mold reaches the forming station, the upper heating plate moves downwards until it contacts the mold surface to transfer temperature and apply pressure, allowing the glass to form within the mold cavity. This structure can only meet the production needs of simple 3D glass. For glass with multiple continuous bends, the mold needs to be designed in sections. The first step uses a bending mold 10 to bend the product shape to obtain a semi-finished product 20. The second step places the semi-finished product 20 into a secondary forming mold 30 and bends the central groove to obtain the final product 40 (e.g., ...). Figure 1 (As shown). Because the above-mentioned hot bending machine adopts a plate pressing structure design with upper and lower heating plates, the heating plate only contacts the mold on one side when the cylinder presses down. The forming function of the machine is limited, and it can only form a surface that is bent in the same direction at a time. It is necessary to remove the glass and perform multiple pressings to complete the forming of multi-faceted continuous curved glass. The molds used to bend multiple curved surfaces are mostly one-piece molds. It is necessary to disassemble the mold into multiple sub-molds according to the product shape, and then produce according to the forming sequence, which prolongs the product production cycle. In addition, the appearance dimensions and precision requirements of multi-faceted continuous curved structures are high. Multiple forming requires the glass to undergo multiple cleaning, clamping, positioning and extrusion, resulting in insufficient product yield, increased labor and material costs, and easy energy waste. Utility Model Content

[0003] Based on this, it is necessary to address the above-mentioned shortcomings by providing a glass hot bending forming structure that adopts a split design, enables multi-stage molding of products using the same mold, improves product production efficiency and yield, reduces production costs, and reduces energy waste.

[0004] A glass hot bending structure, comprising:

[0005] The lower mold has a cavity on its upper surface for placing glass sheets;

[0006] The upper mold is located above the lower mold and abuts against the upper surface of the glass sheet;

[0007] An annular curved edge insert is provided around the upper mold and corresponds to the edge of the glass sheet, and the height of the upper surface of the annular curved edge insert is lower than the height of the upper surface of the upper mold.

[0008] A grooved insert, which is fixed on the upper mold, and the lower surface of the grooved insert corresponds to the middle of the glass sheet;

[0009] A heating plate, the heating plate being suspended above the upper mold; and

[0010] The driving unit includes a first driving component for driving the heating plate to rise and fall so that the heating plate presses against the upper mold and the groove insert, thereby bending the middle of the glass sheet into shape, and at least a second driving component for driving the annular curved edge insert to rise and fall so that the edge of the glass sheet into shape.

[0011] In one embodiment, the upper mold has a first through hole in the middle that penetrates the upper and lower surfaces of the upper mold, the upper surface of the groove insert has a first part that is embedded in the first through hole, and the lower surface of the groove insert protrudes from the lower surface of the upper mold.

[0012] In one embodiment, the upper mold has two second through holes located at the edge of the upper mold and penetrating the upper and lower surfaces of the upper mold on two opposite sides of the first through hole, and the upper surface of the groove insert has two second parts on both sides of the first part that are correspondingly embedded with the two second through holes.

[0013] In one embodiment, the upper surface of the upper mold has two clearance notches communicating with the first through hole on two opposite sides of the first through hole. The clearance notches are provided with limiting grooves. The two opposite sidewalls of the groove insert are provided with two limiting protrusions corresponding to the two limiting grooves. The glass hot bending forming structure also includes a locking pin. The locking pin includes a stop block that abuts against the upper surface of the groove insert and two L-shaped hooks that are symmetrically arranged and fixed at both ends of the stop block. The two L-shaped hooks are engaged with the two limiting protrusions one by one, and the bottom end of the L-shaped hook is located in the limiting groove.

[0014] In one embodiment, the first driving assembly includes a first cylinder, the piston rod end of the first cylinder being fixedly connected to the upper mold; or the first driving assembly includes a servo motor, a lead screw drivenly connected to the output shaft of the servo motor, a slider rotatably sleeved on the lead screw and threadedly connected to the lead screw, and two guide rods disposed opposite to each other on both sides of the lead screw and slidingly engaged with the slider, the slider being fixedly connected to the upper mold, and the guide rods being fixedly connected to the upper surface of the upper mold and extending along the height direction of the upper mold.

[0015] In one embodiment, the second drive assembly includes a plurality of first push rods that slide through the heating plate and are located above the annular curved edge insert, and a plurality of second cylinders that are each corresponding to and driven to drive the first push rods toward or away from the annular curved edge insert.

[0016] In one embodiment, the second drive assembly further includes two second push rods that slide through the heating plate and are located above the second through hole, and two third cylinders that are driven to drive the two second push rods to move the second push rods closer to or away from the second part.

[0017] In one embodiment, the heating plate has a plurality of through holes for correspondingly threading the first push rod and the second push rod.

[0018] In one embodiment, the annular side of the lower mold has multiple limiting notches that penetrate the upper surface of the lower mold and surround the cavity, and the lower surface edge of the annular curved insert has multiple limiting blocks that are correspondingly embedded in each limiting notch.

[0019] In one embodiment, the annular side of the upper mold is provided with a plurality of protrusions, and the inner annular surface of the annular curved edge insert is provided with a slot corresponding to each protrusion.

[0020] The glass hot bending forming structure of this utility model achieves bending forming of the middle part of the glass sheet by the first driving component acting on the heating plate, and achieves bending forming of the edge of the glass sheet by the second driving component acting on the annular bending edge insert. It adopts a split structure, which can realize multi-stage forming of the glass sheet in the same mold without removing the glass sheet and disassembling the mold for multiple pressing. This shortens the glass hot bending processing cycle, improves product production efficiency, and the glass sheet only needs to be positioned once in the hot bending operation. It avoids the increase in cleaning, clamping, positioning and extrusion operations caused by multiple forming, and reduces the problem of insufficient product yield caused by increased operation steps. It also reduces labor and material costs and reduces energy waste. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the traditional hot bending process for glass.

[0022] Figure 2 This is a schematic diagram of the glass hot bending forming structure in one embodiment of the present invention;

[0023] Figure 3 This is a side view of a glass hot bending structure in one embodiment of the present invention;

[0024] Figure 4 This is an exploded view of a glass hot bending forming structure in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the lower mold in one embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the upper mold in one embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the annular curved edge insert in one embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the groove insert in one embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the locking pin in one embodiment of the present invention. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] Please combine Figure 2-8This utility model discloses a glass hot bending forming structure that adopts a split design and can realize multi-stage forming of products in the same mold, improve product production efficiency and yield, reduce production costs and reduce energy waste. The glass hot bending forming structure includes a lower mold 100, an upper mold 200, an annular bending edge insert 300, a groove insert 400, a heating plate 500 and a driving unit. The lower mold 100, the upper mold 200, the annular bending edge insert 300 and the groove insert 400 together form a hot bending mold. The heating plate 500 is used to heat the glass sheet in the mold and soften the glass sheet. The heating plate 500 is also used to press the glass sheet together with the hot bending mold. The driving unit is used to provide the power for the hot bending mold and the heating plate 500 to extrude the glass sheet. Specifically, the upper surface of the lower mold 100 is provided with a cavity 110 for placing the glass sheet. The upper mold 200 is located above the lower mold 100 and abuts against the upper surface of the glass sheet. That is, the glass sheet is placed between the upper mold 200 and the lower mold 100, and the cavity 110 of the lower mold 100 and the lower surface of the upper mold 200 limit the glass sheet. The annular curved edge insert 300 is provided around the upper mold 200 and corresponds to the edge of the glass sheet. The upper surface of the annular curved edge insert 300 is lower than the upper surface of the upper mold 200. It can also be understood that the upper mold 200 is located in the annular space of the annular curved edge insert 300. The groove insert 400 is fixed on the upper mold 200, and the lower surface of the groove insert 400 corresponds to the middle of the glass sheet. The heating plate 500 is suspended above the upper mold 200. The drive unit includes a first drive assembly 600 for driving the heating plate 500 to rise and fall so that the heating plate 500 presses the upper mold 200 and the groove insert 400 to bend the middle of the glass sheet, and a second drive assembly 700 for driving the annular curved edge insert 300 to rise and fall so that the edge of the glass sheet is bent.

[0032] In this scheme, the annular curved edge insert 300 and the groove insert 400 are the main bending components of the glass hot bending forming structure. They are respectively embedded on the outer and inner sides of the upper mold 200. After the glass hot bending forming structure is assembled, since the upper surface height of the annular curved edge insert 300 is lower than the upper surface height of the upper mold 200, and the annular curved edge insert 300 and the upper mold 200 are independent of each other, the annular curved edge insert 300 and the groove insert 400 are on different planes and can move freely up and down without interfering with each other. This allows the heating plate 500 to push the upper mold 200 and the groove insert 400 down during the descent process, so as to press the middle part of the glass sheet and realize independent pressing of the edge and middle of the glass sheet. It should be noted that in this embodiment, the height difference between the upper surface of the annular curved edge insert 300 and the upper surface of the upper mold 200 is greater than or equal to the maximum stroke of the upper mold 200 during descent, so as to avoid the annular curved edge insert 300 being pressed down during the pressing of the heating plate 500. In this way, the amount of hot bending deformation in the middle and edge of the glass sheet can be independently controlled by the first driving component 600 and the second driving component 700, thereby improving the hot bending accuracy of the glass sheet.

[0033] The lower mold 100 is used to fix the glass sheet to the worktable of the hot bending machine for positioning the entire glass hot bending structure and the glass sheet to be bent. The lower mold 100 is also used to fix the glass sheet to be bent, define the position of the glass sheet, and support the pressure of the upper mold 200 and the heating plate 500. In this embodiment, the lower surface of the lower mold 100 is provided with a positioning groove or positioning notch 120 that matches the positioning pin on the worktable of the hot bending machine. This facilitates the removal and removal of the lower mold 100 and prevents the lower mold 100 from shaking within the worktable surface during the hot bending process. This ensures that the first drive component 600 can be aligned with the corresponding position on the heating plate 500 and the second drive component 700 can be aligned with the corresponding position on the annular curved edge insert 300, thus ensuring the hot bending accuracy of the product. In one embodiment, the annular side of the lower mold 100 is provided with a plurality of limiting notches 130 that penetrate the upper surface of the lower mold 100 and surround the cavity 110. The lower surface edge of the annular curved edge insert 300 is provided with a plurality of limiting blocks 310 that are correspondingly embedded in each limiting notch 130. The outer contour shape of each limiting block 310 corresponds to the inner contour shape of each limiting notch 130. The outer edge of the annular curved edge insert 300 is flush with the outer edge of the lower mold 100. Thus, when the annular curved edge insert 300 is assembled with the lower mold 100, it can prevent the annular curved edge insert 300 from shaking or rotating relative to the lower mold 100 in the horizontal plane, thereby achieving the limiting of the annular curved edge insert 300.

[0034] It should be noted that the cross-sectional area of ​​the upper mold 200 is smaller than that of the lower mold 100. The upper mold 200 is located in the middle of the cavity 110 of the lower mold 100. When a glass sheet to be heat-bent is placed in the cavity 110 and the upper mold 200 presses onto the glass sheet, the edge of the glass sheet extends from the annular side of the upper mold 200 so that the annular bending insert 300 can press the extended part. Furthermore, the annular side of the upper mold 200 is provided with multiple protrusions 210, and the inner annular surface of the annular bending insert 300 is provided with a groove 320 corresponding to each protrusion 210. In this way, the upper mold 200 and the annular bending insert 300 achieve limiting in the horizontal plane (the plane where the upper surface of the upper mold 200 is located) through the convex-concave engagement of the protrusions 210 and the grooves 320, so as to prevent the upper mold 200 and the annular bending insert 300 from generating relative displacement in the horizontal plane during the heat bending process, thereby reducing the defects in heat bending of the product.

[0035] The upper mold 200 serves two purposes: firstly, it fixes the upper surface of the glass sheet, preventing it from swaying vertically (in the height direction of the upper mold 200); secondly, it supports the other components. In one embodiment, the upper mold 200 has a first through hole 220 penetrating both its upper and lower surfaces in its center. The upper surface of the groove insert 400 has a first part 410 that is embedded in the first through hole 220, and the lower surface of the groove insert 400 protrudes beyond the lower surface of the upper mold 200. The shape of the portion of the lower surface of the groove insert 400 protruding beyond the lower surface of the upper mold 200 determines the shape of the center of the formed glass. In this embodiment, the cross-sectional dimension of the groove insert 400 is less than or equal to the cross-sectional dimension of the first through hole 220. That is, the top of the groove insert 400 can be completely embedded in the first through hole 220, and the first part 410 can also be part of the top of the groove insert 400 and embedded in the first through hole 220. This groove insert 400 is suitable for situations where grooves are only processed in the center of the glass sheet. In another embodiment, when a first through hole 220 is opened in the middle of the upper mold 200 and a first part 410 is provided on the upper surface of the groove insert 400, two second through holes 230 are opened on the two opposite sides of the first through hole 220 on the upper mold 200, located at the edge of the upper mold 200 and penetrating the upper and lower surfaces of the upper mold 200. Two second parts 420 are opened on the upper surface of the groove insert 400 on both sides of the first part 410, which are correspondingly embedded in the two second through holes 230. At this time, the two second parts 420 correspond to the edge of the glass sheet. The groove insert 400 spans the entire long or short side of the glass sheet so as to form a large arc surface by hot bending on the glass sheet. This groove insert 400 is suitable for glass structures that are bent in multiple directions at the edges and in the middle and connected to large flat surfaces.

[0036] In one embodiment, the recessed insert 400 is fixed to the upper mold 200 by screws or clips. (Please refer to...) Figure 6 , Figure 8 as well as Figure 9To reduce the difficulty of disassembling the groove insert 400, in another embodiment, the upper surface of the upper mold 200 has two clearance notches 240 communicating with the first through hole 220 on two opposite sides. The clearance notches 240 are provided with limiting grooves 250. The two opposite sidewalls of the groove insert 400 are provided with two limiting protrusions 430 corresponding to the two limiting grooves 250. The glass hot bending forming structure also includes a locking pin 800. The locking pin 800 includes a stop block 810 that abuts against the upper surface of the groove insert 400 and two L-shaped hooks 820 that are symmetrically arranged and fixed at both ends of the stop block 810. The two L-shaped hooks 820 are engaged with the two limiting protrusions 430 one by one, and the bottom end of the L-shaped hook 820 is located in the limiting groove 250. In this solution, the L-shaped hook 820 of the locking pin 800 engages with the limiting protrusion 430 on the side of the groove insert 400 to achieve the locking pin 800 and the groove insert 400. The engagement between the locking pin 800 and the upper mold 200 upper limit groove 250 limits the relative position of the groove insert 400 and the upper mold 200 in the vertical direction, preventing the groove insert 400 from falling down from the upper mold 200 during the mold removal process, thus achieving the positioning of the groove insert 400. When disassembling the glass hot bending forming structure, it is only necessary to remove the groove insert 400 from above the upper mold 200, which reduces the difficulty of disassembling the groove insert 400.

[0037] In this design, the heating plate 500 is made of a metal material with good thermal conductivity, such as aluminum alloy or stainless steel. The heating plate 500 can be connected to an external heating device, which conducts heat to the heating plate 500 to raise its temperature. Alternatively, heating wires or conductive graphene layers can be arranged inside the heating plate 500. By connecting the heating wires or conductive graphene layers to an external circuit, they generate heat when energized, thus raising the temperature of the heating plate 500. During the hot bending process of the glass sheet, the heating plate 500, by being close to the upper mold 200 and the annular bending edge insert 300, generates heat radiation on the glass between the upper mold 200 and the lower mold 100, causing the glass to soften upon heating, thus allowing it to bend and deform under pressure. To achieve the lifting and lowering of the heating plate 500, in one embodiment, the first driving assembly 600 includes a first cylinder. The piston rod of the first cylinder is fixedly connected to the upper mold 200. The first cylinder is located above the upper mold 200, and the piston rod of the first cylinder extends vertically. Thus, by extending and retracting the piston rod of the first cylinder, the upper mold 200 and the groove insert 400 can be driven to lift and lower, so that the groove insert 400 presses the middle of the glass sheet, forming a groove in the middle of the product. In another embodiment, the first driving assembly 600 includes a servo motor, a lead screw driven and connected to the output shaft of the servo motor, a slider rotatably sleeved on the lead screw and threadedly connected to the lead screw, and two guide rods oppositely disposed on both sides of the lead screw and slidingly engaged with the slider. The slider is fixedly connected to the upper mold 200, and the guide rods are fixedly connected to the upper surface of the upper mold 200 and extend along the height direction of the upper mold 200. In this embodiment, the bottom of the slider is fixedly connected to the upper mold 200. The upper surface of the slider is provided with a threaded groove, and a round hole for the guide rod is provided on each side of the threaded groove. The bottom end of the lead screw is inserted into the threaded groove. Thus, when the servo motor is working, the output shaft of the servo motor drives the lead screw to rotate. Through the threaded engagement between the lead screw and the slider and the sliding limit between the slider and the guide rod, the slider can drive the upper mold 200 to rise and fall along the length of the lead screw, so that the groove insert 400 can perform hot bending forming on the middle part of the glass sheet.

[0038] The second driving assembly 700 includes a plurality of first push rods 710 that slide through the heating plate 500 and are located above the annular curved edge insert 300, and a plurality of second cylinders 720 that are driven and connected to each of the first push rods 710 to drive the first push rods 710 closer to or away from the annular curved edge insert 300. In one embodiment, the lower mold 100, upper mold 200, heating plate 500, and groove insert 400 are all rectangular plate structures, and the annular curved edge insert 300 is a rectangular ring structure. The second driving assembly 700 includes four first push rods 710 and four second cylinders 720 that correspond to the four corners of the annular curved edge insert 300. In other embodiments, the number of first push rods 710 and second cylinders 720 can be further adjusted to increase the effective area of ​​the second driving assembly 700 on the annular curved edge insert 300. Furthermore, the second drive assembly 700 also includes two second push rods 730 that slide through the heating plate 500 and are located above the second through hole 230, and two third cylinders 740 that are correspondingly connected to the two second push rods 730 to drive the second push rods 730 closer to or further away from the second part 420. Thus, by driving the four first push rods 710 downwards through the four second cylinders 720, the bottom end of the first push rod 710 contacts and presses against the upper surface of the annular curved edge insert 300, causing the product edge to bend and form. By driving the two second push rods 730 downwards through the two third cylinders 740, the bottom end of the second push rod 730 contacts the second part 420 of the groove insert 400, thereby achieving positioning of the center of the glass sheet. In this design, both the first push rods 710 and the second push rods 730 are metal push rods, which can be made of aluminum alloy or stainless steel. Furthermore, the heating plate 500 is provided with a plurality of through holes 510 for correspondingly threading the first push rod 710 and the second push rod 730. The through holes 510 serve two purposes: firstly, to provide a threading channel for the first push rod 710 and the second push rod 730; secondly, the hole wall of the through holes 510 also serves to limit the lifting trajectory of the first push rod 710 and the second push rod 730, so as to avoid shaking during the lifting and lowering process of the first push rod 710 and the second push rod 730 and ensure the hot bending accuracy of the glass sheet.

[0039] In this solution, the original plate pressing structure of the hot bending forming machine is upgraded to a structure combining plate pressing and rod pressing, realizing multi-station continuous forming of glass sheets. Multiple independent second cylinders 720 control the lifting and lowering of corresponding first push rods 710 to control the hot bending shape of the glass sheet edge. In standby mode, the first push rod 710 and the second push rod 730 are hidden in the through hole 510 of the heating plate 500. During operation, the heating plate 500, the first push rod 710, and the second push rod 730 can work together in various ways to apply to the hot bending mold. For example, in a split mold structure, in the first forming station, the heating plate 500 first presses the middle of the mold, and in the second forming station, the first push rod 710 and the second push rod 730 press the edge of the mold; or in the first forming station, the first push rod 710 and the second push rod 730 first press the edge of the mold, and in the second forming station, the heating plate 500 presses the middle of the mold, ultimately achieving multi-station continuous forming. In this way, the groove insert 400 in the middle of the mold and the annular curved insert 300 on the edge can be independently subjected to the action of the heating plate 500 and the metal rods (first push rod 710 and second push rod 730), which can simultaneously take care of the forming of multiple curved surfaces. This allows for continuous operation and complementary interference, greatly improving production efficiency, while also improving product precision and reducing costs.

[0040] The hot bending process of glass sheets includes the following steps:

[0041] Step 1: Incoming Glass Material; First, clean the incoming glass material, which can be done using ultrasonic cleaning or a flatbed cleaning machine. After cleaning, insert the glass into the holder and store it in a dust-free plastic frame. For each batch of incoming glass material, 5% to 10% should be randomly sampled for cleanliness, appearance defects (scratches, chipping), and dimensional control. If any problems are found, isolate them immediately and conduct a full inspection.

[0042] Step 2, Mold Measurement: Measure each part of the hot bending mold, including data such as contour, flatness, roughness, and thickness. In particular, the glass contact surface needs to be strictly controlled to ensure the standardization and consistency of the mold.

[0043] Step 3: Mold assembly.

[0044] Step 4: Preheating the mold: Cycle the hot bending mold at a temperature above 600℃ twice to remove moisture from the mold material, activate the molecular structure of the mold, eliminate gaps, and ensure the stability of the mold dimensions.

[0045] Step 5, Mold Cleaning: After heating the mold, wipe the edges and corners of the hot bending mold surface with a clean, lint-free cloth. Then wipe the edges and corners of the upper mold 200, lower mold 100, and all surfaces of the part's inner cavity. First, wipe the forming surface of the part once in one direction with a white abrasive cloth; then wipe the forming surface of the part twice in one direction with a clean, lint-free cloth; finally, use a vacuum cleaner to remove the dust from the edges and corners of the upper mold 200, lower mold 100, and the part's inner cavity.

[0046] Step 6, Material Placement: Before placing the material, wear gloves and finger cots, then take the glass out of the dust-free plastic frame, and visually inspect it for 3 seconds against the light to check for dust spots, dirt, chipped edges, or other appearance defects. After ensuring that the incoming glass is free of defects, place it into the cavity 110 of the lower mold 100 in the corresponding position.

[0047] Step 7, Mold Closing: After placing the glass, quickly close the upper mold 200 and the groove insert 400. When closing the mold, find the guide positioning and keep the upper mold 200 stable on the glass surface.

[0048] Step 8, Start-up: Before starting the machine, check the set positions of the metal rods (first push rod 710 and second push rod 730) and the heating plate 500, and check the set temperature of the machine. After starting the machine, observe the position where the metal rods and the heating plate 500 are pressed down to the mold.

[0049] Step 9, Glass Unloading: After the mold comes out of the cooling station of the hot bending forming machine, open the upper mold 200 component steadily with both hands, rotate the upper mold 200 180° and place it on the worktable, and then use a suction pen to remove the product from the mold.

[0050] The glass hot bending structure of this utility model achieves bending and forming of the middle part of the glass sheet by the first driving component 600 acting on the heating plate 500, and bending and forming of the edge of the glass sheet by the second driving component 700 acting on the annular bending edge insert 300. It adopts a split structure, which can realize multi-stage forming of the glass sheet in the same mold without removing the glass sheet and disassembling the mold for multiple pressing. This shortens the glass hot bending processing cycle, improves product production efficiency, and the glass sheet only needs to be positioned once in the hot bending operation. This avoids the increase in cleaning, clamping, positioning and extrusion operations caused by multiple forming, and reduces the problem of insufficient product yield caused by increased operation steps. It also reduces labor and material costs and reduces energy waste.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A glass hot bending forming structure, characterized in that, include: The lower mold has a cavity on its upper surface for placing glass sheets; The upper mold is located above the lower mold and abuts against the upper surface of the glass sheet; An annular curved edge insert, wherein the annular curved edge insert is arranged around the upper mold and corresponds to the edge of the glass sheet, and the height of the upper surface of the annular curved edge insert is lower than the height of the upper surface of the upper mold; A grooved insert, which is fixed on the upper mold, and the lower surface of the grooved insert corresponds to the middle of the glass sheet; A heating plate, which is suspended above the upper mold; as well as The driving unit includes a first driving component for driving the heating plate to rise and fall so that the heating plate presses against the upper mold and the groove insert, thereby bending the middle of the glass sheet into shape, and at least a second driving component for driving the annular curved edge insert to rise and fall so that the edge of the glass sheet into shape.

2. The glass hot bending forming structure according to claim 1, characterized in that, The upper mold has a first through hole in the middle that penetrates the upper and lower surfaces of the upper mold, the upper surface of the groove insert has a first part that is embedded in the first through hole, and the lower surface of the groove insert protrudes from the lower surface of the upper mold.

3. The glass hot bending forming structure according to claim 2, characterized in that, The upper mold has two second through holes located at the edge of the upper mold and penetrating the upper and lower surfaces of the upper mold on two opposite sides of the first through hole. The upper surface of the groove insert has two second parts on both sides of the first part that are correspondingly embedded with the two second through holes.

4. The glass hot bending forming structure according to claim 2 or 3, characterized in that, The upper surface of the upper mold has two clearance notches on two opposite sides of the first through hole, which communicate with the first through hole. The clearance notches are provided with limiting grooves. The two opposite sidewalls of the groove insert are provided with two limiting protrusions that correspond to the two limiting grooves. The glass hot bending forming structure also includes a locking pin. The locking pin includes a stop block that abuts against the upper surface of the groove insert and two L-shaped hooks that are symmetrically arranged and fixed at both ends of the stop block. The two L-shaped hooks are engaged with the two limiting protrusions one by one, and the bottom end of the L-shaped hook is located in the limiting groove.

5. The glass hot bending forming structure according to claim 1, characterized in that, The first driving assembly includes a first cylinder, the piston rod end of the first cylinder being fixedly connected to the upper mold; or the first driving assembly includes a servo motor, a lead screw driven and connected to the output shaft of the servo motor, a slider rotatably sleeved on the lead screw and threadedly connected to the lead screw, and two guide rods oppositely arranged on both sides of the lead screw and slidingly engaged with the slider, the slider being fixedly connected to the upper mold, and the guide rods being fixedly connected to the upper surface of the upper mold and extending along the height direction of the upper mold.

6. The glass hot bending forming structure according to claim 3, characterized in that, The second drive assembly includes a plurality of first push rods that slide through the heating plate and are located above the annular curved edge insert, and a plurality of second cylinders that are correspondingly connected to each of the first push rods to drive the first push rods closer to or away from the annular curved edge insert.

7. The glass hot bending forming structure according to claim 6, characterized in that, The second drive assembly also includes two second push rods that slide through the heating plate and are located above the second through hole, and two third cylinders that are connected to the two second push rods in a one-to-one driving manner to drive the second push rods closer to or away from the second part.

8. The glass hot bending forming structure according to claim 7, characterized in that, The heating plate has multiple through holes for corresponding insertion of the first push rod and the second push rod.

9. The glass hot bending forming structure according to claim 1, characterized in that, The lower mold has multiple limiting notches on its annular side that penetrate the upper surface of the lower mold and surround the cavity. The lower surface edge of the annular curved insert has multiple limiting blocks that are embedded in each limiting notch.

10. The glass hot bending forming structure according to claim 1, characterized in that, The upper mold has multiple protrusions on its annular side surface, and the inner annular curved edge insert has a slot corresponding to each protrusion.

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