A hot bending mold and method for processing automotive glass

Abstract

This invention belongs to the field of automotive glass hot bending technology, specifically a hot bending mold and method for automotive glass processing. It includes a mold base mechanism and automotive glass, with the mold base mechanism placed on the ground. A hot bending drive mechanism is placed on top of the mold base mechanism, autonomously bending the heated automotive glass. Two ends of the hot bending drive mechanism are connected to a first support mechanism, which is configured in four groups. The first support mechanism supports the automotive glass before it is heated. This invention achieves precise temperature-mechanical linkage between automatic support removal when the glass softens to a suitable state and the bending initiation by setting a fusible wire with a specific melting temperature in the first support mechanism and connecting both ends of the fusible wire to a fourth connecting rod and a first fixing groove. This solves the problems of existing technologies that rely on external sensors or manual judgment of bending timing, and glass cracking or edge collapse due to starting too early or too late.

Description

Technical Field

[0001] This invention relates to the field of hot bending technology for automotive glass, specifically to a hot bending mold and method for processing automotive glass. Background Technology

[0002] Hot bending of automotive glass is a crucial process in automotive glass production. Its core involves heating flat glass to a softened state and then bending it into the desired three-dimensional curved shape using a mold. Currently, commonly used hot bending molds are mainly divided into two categories: gravity forming molds and compression forming molds. Gravity forming molds rely on the softened glass's downward sag to conform to the mold surface. However, its bending shape is greatly affected by the glass thickness, degree of softening, and gravity distribution, resulting in limited forming accuracy, especially for automotive glass with large curvatures or complex surfaces. Compression forming molds, on the other hand, typically use external power (such as cylinders, hydraulic cylinders, or motor screws) to drive the moving mold part to apply pressure to the softened glass, causing it to conform to the fixed mold surface.

[0003] However, existing hot bending dies still have the following technical problems in practical applications: First, bending drives rely on external power sources. Traditional pressing molds require cylinders, hydraulic systems, or servo motors and their control devices, resulting in complex equipment structures, high manufacturing costs, high energy consumption, and difficult maintenance. For small and medium-sized glass processing enterprises, equipment investment and maintenance costs have become significant constraints.

[0004] Secondly, the timing of the bending initiation is difficult to control precisely. The bending action needs to be initiated when the glass has just softened to a suitable state. Existing technologies typically rely on operator experience or external temperature sensors in conjunction with the control system. Human judgment is inconsistent, easily leading to problems such as initiating too early, causing glass cracking or rebound, or initiating too late, causing excessive softening of the glass, resulting in edge collapse or uneven thickness. Sensor control increases system complexity and potential points of failure, and sensor response delays can also affect molding quality.

[0005] Third, the bending trajectory of the mold is fixed and lacks adaptability. The moving parts of the existing molds usually move along a preset fixed trajectory, and cannot be dynamically adjusted according to the actual softening degree of the glass, thickness fluctuations, or batch differences. Once the glass properties change, it is necessary to readjust the equipment or even replace the mold, resulting in a narrow process window and poor product consistency.

[0006] Fourth, inadequate edge support for the glass. During hot bending, the glass edge area is prone to collapse or wavy deformation due to lack of support; if rigid support is used, indentations or stress concentrations will occur on the glass surface, affecting optical quality and strength. Edge defects are unacceptable, especially for products like automotive glass, which have extremely high requirements for optical performance and safety.

[0007] Fifth, the bending speed is uncontrollable. When the weight of the glass is used as the bending force, the glass softens and then falls suddenly, which can cause an impact and lead to excessive instantaneous force on the glass, causing it to break. If an external power drive is used, speed control usually relies on a throttle valve or servo adjustment, which increases system cost and debugging difficulty.

[0008] Therefore, we propose a hot bending die and method for automotive glass processing. Summary of the Invention

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A hot bending die for automotive glass processing includes: a die base mechanism and automotive glass, wherein the die base mechanism is placed on the ground; A hot bending drive mechanism is placed on top of the mold base mechanism. The hot bending drive mechanism autonomously bends the heated automotive glass. The two ends of the hot bending drive mechanism are connected to the first support mechanism, which is set into four groups. The first support mechanism supports the automotive glass before it is heated. The middle of the mold base mechanism is provided with the first mold mechanism. The two ends of the first mold mechanism are connected to the two ends of the hot bending drive mechanism. The first mold mechanism bends to adapt to the heated automotive glass as it is driven by the hot bending drive mechanism. The front and rear ends of the first mold mechanism are connected to the second mold mechanism. The second mold mechanism is installed at the front and rear ends of the mold base mechanism. The second mold mechanism bends as the first mold mechanism bends, and the second mold mechanism also supports the automotive glass before it is heated.

[0010] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the mold base mechanism includes: a mold base assembly; The mold base assembly is placed on the ground. The front and rear ends of the mold base assembly are connected to a third base. The front and rear ends of the third base are connected to a second base. A support seat is installed on the surface of the third base. The support seat is also installed on the left and right ends of the surface of the second base.

[0011] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the mold base assembly includes: a first base; The first base is placed on the ground and is located in the middle of the second base. The front and rear sides of the first base are provided with sliding grooves, and the inner side of the sliding groove is provided with a first fixing groove. The first fixing groove is located on the front and rear sides of the first base.

[0012] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the hot bending driving mechanism includes: a pressing linkage component; The pressing linkage assembly is installed at both ends of the surface of the first base in the mold base mechanism. The top of the pressing linkage assembly contacts the bottom center of the car glass. The pressing linkage assembly is slidably connected to the center of the first mold mechanism. One end of the pressing linkage assembly is connected to the hot bending drive assembly, and the other end of the hot bending drive assembly is connected to the bending rod.

[0013] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the pressing linkage component includes: a damper; The damper is installed in the middle of the surface of the first base in the mold base mechanism. A rack is installed on the top of the damper, and a pressing rod is provided on the top of the rack. The pressing rod is slidably connected to the center of the first mold mechanism. The top of the pressing rod contacts the bottom center of the car glass. The two ends of the rack are meshed with one end of the first gear, and the other end of the first gear is meshed with the right end of the second gear. The first gear and the second gear are installed inside the upper end of the Y-shaped bracket. The Y-shaped bracket is installed on both ends of the surface of the first base. The left end of the second gear is meshed with the third gear, and the left end of the third gear is meshed with the fourth gear. The third gear and the fourth gear are installed on both ends of the surface of the first base through the bracket.

[0014] As a preferred embodiment of the hot bending die for automotive glass processing according to the present invention, the hot bending drive assembly includes: a fifth gear; The right end of the fifth gear meshes with the fourth gear, the left end of the fifth gear meshes with the sixth gear, and the left end of the sixth gear meshes with the seventh gear. The fifth, sixth, and seventh gears are all mounted on both ends of the surface of the first base via brackets. The front and rear ends of the sixth gear are connected to the first connecting rod, and the front and rear ends of the seventh gear are connected to the second connecting rod. The left end of the second connecting rod is rotatably connected to the outer wall of the curved rod, and the left end of the first connecting rod is rotatably connected to the outer wall of the curved rod. The left end of the third connecting rod is rotatably connected to the outer wall of the curved rod.

[0015] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the first support mechanism includes: an arc-shaped top rod; The arc-shaped ejector pin is slidably connected to the front and rear ends of the first mold mechanism. The bottom of the arc-shaped ejector pin is provided with a vertical rod. The bottom of the vertical rod is rotatably connected to the fourth connecting rod. The rear end of the fourth connecting rod is rotatably connected to the slider. The slider is slidably connected to the inside of the slide groove in the mold base mechanism. The right end of the slider is connected to the tension spring. The right end of the tension spring is connected to the right end of the inner wall of the slide groove. The front end of the fourth connecting rod is detachably equipped with a fuse. The other end of the fuse is detachably installed inside the first fixed groove in the mold base mechanism.

[0016] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the first mold mechanism includes: a first arc-shaped mold; The first arc-shaped mold is set at the top center of the first base in the mold base mechanism. The center of the first arc-shaped mold has a central groove. The pressing rod of the hot bending drive mechanism is slidably connected inside the central groove. The front and rear ends of the top of the first arc-shaped mold are provided with arc-shaped grooves. The arc-shaped top rod of the first support mechanism is slidably connected inside the arc-shaped grooves. The two ends of the first arc-shaped mold are rotatably connected to the first bending mold. The other end of the first bending mold is rotatably connected to the outer wall of the bending rod.

[0017] As a preferred embodiment of the hot bending mold for automotive glass processing according to the present invention, the second mold mechanism includes: a second arc-shaped mold; The second arc-shaped mold is connected to the front and rear ends of the first arc-shaped mold in the first mold mechanism. The second arc-shaped mold is set in several groups, and the several groups of second arc-shaped molds are connected by connecting rods. The outer walls of the frontmost connecting rod and the rearmost connecting rod are equipped with support frames. The bottom of the support frames is installed on both ends of the surface of the second base in the mold base mechanism. The two ends of the second arc-shaped mold are rotatably connected to edge support components. The other end of the edge support components is rotatably connected to the outer wall of the bending rod in the hot bending drive mechanism. The edge support assembly includes: a second bending mold; The second bending mold is rotatably connected to the rear sides of both ends of the second arc-shaped mold. The front sides of both ends of the second arc-shaped mold are rotatably connected to the third bending mold. The other ends of the second bending mold and the third bending mold are rotatably connected to the outer wall of the bending rod. The inner walls of the second bending mold and the third bending mold are both provided with limiting grooves. The inner side of the inner wall of the third bending mold is provided with a shaft column. The outer wall of the shaft column is rotatably connected to an edge support rod. The two ends of the edge support rod are connected to torsion springs. The other end of the torsion springs is connected to the inner side of the inner wall of the second bending mold and the third bending mold. The outer end of the edge support rod is rotatably connected to a pulling rod. The outer end of the pulling rod is rotatably connected to a limiting post. The limiting post is slidably connected inside the limiting groove.

[0018] A method for operating a hot bending die for automotive glass processing includes the following steps: S1: Connect the inner end of the fuse wire to the first fixing groove, extend the arc-shaped top rod out of the arc-shaped groove of the first arc-shaped mold, and place the car glass on the top of the first mold mechanism and the second mold mechanism. At this time, the outer ends of the arc-shaped top rod and the edge support rod support the bottom two ends of the car glass, so that the bottom center of the car glass contacts the top of the pressing rod.

[0019] S2: By smoothly pushing the automotive glass into a hot bending furnace or a continuous hot bending heating furnace, during the heating process, all metal parts heat up with the furnace, and the automotive glass gradually softens. The fuse is an alloy wire that melts at a specific temperature, which is lower than the complete softening temperature of the glass but higher than the elastic deformation temperature of the glass. When the furnace temperature reaches the melting threshold of the fuse, the fuse melts instantly. After the fuse breaks, the front end of the fourth link loses its constraint. Under the restoring force of the tension spring, the slider slides to the right along the slide groove. Through the fourth link and the vertical rod, the arc-shaped top rod is driven to retract downward along the arc groove until the arc-shaped top rod is completely submerged in the first arc mold. During the retraction process, the elastic potential of the tension spring causes the arc-shaped top rod to slowly bend the softened automotive glass. S3: With both ends of the car window unsupported, the entire weight of the glass acts on the top of the pressing rod. The pressing rod bears the weight of the glass, compressing the damper downwards and simultaneously causing the rack to descend at a constant speed. The damper controls the descent speed to prevent the glass from falling too quickly and causing impact cracks. As the rack moves downwards, the racks on both sides mesh with the first gear, driving the first gear to rotate clockwise from one side. The first gear drives the second gear to rotate counterclockwise, the second gear drives the third gear to rotate clockwise, the third gear drives the fourth gear to rotate counterclockwise, the fourth gear drives the fifth gear to rotate clockwise, the fifth gear drives the sixth gear to rotate counterclockwise, and the sixth gear drives the seventh gear to rotate clockwise. The rotation of the sixth and seventh gears respectively causes the first, second, and third connecting rods to swing. The left ends of these connecting rods... As the bending rod is pushed, it undergoes inward bending deformation. Due to the elasticity of the bending rod and the freedom of both ends, the middle part arches upward under the push of the connecting rod, while the two ends contract downward and inward. The bending motion of the bending rod simultaneously drives the first bending mold, the second bending mold, and the third bending mold to rotate around their respective rotation connection points, causing the arc surfaces of these molds to gradually rise and approach the bottom of the car glass. At the same time, the limiting post in the edge support assembly slides inward along the limiting groove, and the edge support rod gradually flattens with the assistance of the torsion spring, providing continuous but flexible support for the edge of the glass. Under the combined action of the glass's own weight and the upward bending motion of the lower mold, the softened car glass gradually conforms to the final curved surface formed by the first arc mold, the first bending mold, the second arc mold, the second bending mold, and the third bending mold. S4: The entire bending process is adaptive: the deeper the glass is pressed down, the more the toothed rod descends, the greater the degree of bending of the bending rod pushed by the connecting rod, and the greater the bending angle of the mold, until the glass completely fits the mold. When the pressing rod descends to the lowest position, the bending deformation of the bending rod reaches its maximum value. The first bending mold and the second and third bending molds all rotate to the preset final bending angle. At this time, the furnace temperature is kept above the softening point for 5 to 15 minutes to allow the internal stress of the glass to fully relax and set. S5: Start cooling according to process requirements: First, slowly reduce the temperature to the annealing temperature range at 1~3℃ / min, then cool with the furnace or cool rapidly. During the cooling process, keep the mold in a bent state to prevent the glass from springing back. When the glass temperature drops below 80℃, open the furnace door and take out the mold and finished glass. At this time, the automotive glass has been formed into the required bent shape. Finally, carefully remove the finished glass from the mold. Since the glass has hardened and the mold is a split structure, it can usually be taken out directly upwards.

[0020] Compared with existing technologies: This invention achieves precise temperature-mechanical linkage between automatic support removal and bending initiation when the glass softens to a suitable state by setting a fuse wire with a specific melting temperature in the first support mechanism and connecting the two ends of the fuse wire to the fourth connecting rod and the first fixing groove, thereby solving the problems of existing technologies that rely on external sensors or manual judgment of bending timing, and glass cracking or edge collapse due to starting too early or too late. This invention uses the gravity of the car glass itself as the sole bending power source, which is transmitted to the bending rod via a pressing rod, a rack, a multi-stage gear set, and a connecting rod. This achieves self-driven bending with zero external energy consumption, solving the problems of complex equipment, high cost, and high energy consumption caused by traditional hot bending molds relying on external power sources such as cylinders and motors. This invention converts the vertical linear motion of the pressing rod into the oscillation of the first, second, and third connecting rods through the meshing of the first to seventh gears, thereby driving the bending rod to undergo inward bending deformation. This achieves efficient, synchronous, and force amplification conversion of the vertical pressing amount to the bending angle of the mold, solving the problems of low transmission accuracy, left-right asynchrony, and insufficient driving force in existing bending mechanisms. This invention forms an adaptive bending closed loop without electronic feedback by mechanically linking the glass pressing depth with the descent stroke of the rack, the swing amplitude of the connecting rod, and the bending degree of the bending rod. This enables the mold bending angle to automatically match the actual softening and sinking of the glass until it is completely fitted, solving the problem that traditional fixed trajectory molds cannot adapt to differences in glass batches and require frequent adjustments. This invention solves the problems of uncontrollable falling speed of glass due to its own weight and easy generation of impact cracks by installing a damper at the bottom of the toothed rod to control the descent speed of the pressing rod and the toothed rod. This invention provides continuous flexible support and adaptive flattening of the glass edge during bending by setting a torsion spring-connected edge support rod in the edge support assembly and cooperating with the limiting groove and limiting post guide. This solves the problem of insufficient support for the glass edge in traditional molds, which leads to edge collapse or indentation due to excessive support. This invention forms a split multi-segment mold structure by connecting a first arc mold, a first bending mold, multiple sets of second arc molds, and second and third bending molds in segments for rotation. This structure enables high-precision fitting of complex three-dimensional curved surfaces and independent movement of each segment, solving the problems of difficult processing of complex curved surfaces and high maintenance costs associated with integral molds. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main view structure provided by the present invention; Figure 2 This is a schematic diagram of the overall disassembled structure provided by the present invention; Figure 3 A schematic diagram of the connection structure of the mold base mechanism provided by the present invention; Figure 4 This is a schematic diagram of the mold base assembly structure provided by the present invention; Figure 5 This is a schematic diagram of the connection structure of the hot bending drive mechanism provided by the present invention; Figure 6 A schematic diagram of the thermal bending drive mechanism provided by the present invention; Figure 7 This is a schematic diagram of the thermal bending drive assembly structure provided by the present invention; Figure 8 Schematic diagram of the first mold mechanism connection structure provided by the present invention Figure 1 ; Figure 9 Schematic diagram of the first mold mechanism connection structure provided by the present invention Figure 2 ; Figure 10 A schematic diagram of the first mold mechanism structure provided by the present invention; Figure 11 A schematic diagram of the first support mechanism structure provided by the present invention; Figure 12 This is a schematic diagram of the second mold mechanism structure provided by the present invention; Figure 13 Schematic diagram of the disassembled structure of the second mold mechanism provided by the present invention Figure 1 ; Figure 14 Schematic diagram of the disassembled structure of the second mold mechanism provided by the present invention Figure 2 . Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] This invention provides a hot bending die and method for automotive glass processing. Please refer to [link / reference]. Figure 1 - Figure 14It includes a mold base mechanism 1, a hot bending drive mechanism 2, a first support mechanism 3, a first mold mechanism 4, a second mold mechanism 5, and automotive glass 6; The mold base mechanism 1 is placed on the ground and supports the hot bending drive mechanism 2. The mold base mechanism 1 includes: a mold base assembly 11, a first base 111, a slide groove 112, a first fixing groove 113, a second base 12, a third base 13, and a support seat 14. The mold base assembly 11 is placed on the ground, and the first base 111 is placed on the ground. The first base 111 is located in the middle of the second base 12. Slide grooves 112 are provided on both sides of the front end and both sides of the rear end of the first base 111. The slide grooves 112 can limit and guide the movement of the first support mechanism 3. The inner side of the slide groove 112 is provided with the first fixing groove 113. The first fixing groove 113 is located on both sides of the front end of the first base 111. On the sides and rear end, the first fixing groove 113 is connected to one end of the fuse 36 of the first support mechanism 3, so that the first support mechanism 3 can be pulled and limited through the fuse 36. The front end and rear end of the mold base assembly 11 are connected to the third base 13, and the front end and rear end of the third base 13 are connected to the second base 12. The surface of the third base 13 is equipped with a support seat 14, and the support seat 14 is also installed on the left and right ends of the surface of the second base 12. The support seat 14 is used to support and place the bending rod 23. The mold base assembly 11, the second base 12 and the third base 13 are connected to each other to form a U-shape. The mold base assembly 11, the second base 12 and the third base 13 can support and place the hot bending drive mechanism 2. The hot bending drive mechanism 2 is placed on top of the mold base mechanism 1. The hot bending drive mechanism 2 autonomously bends the heated automotive glass 6. The hot bending drive mechanism 2 includes: a pressing linkage assembly 21, a damper 211, a rack 212, a pressing rod 213, a Y-shaped bracket 214, a first gear 215, a second gear 216, a third gear 217, a fourth gear 218, a hot bending drive assembly 22, a fifth gear 221, a sixth gear 222, a seventh gear 223, a first connecting rod 224, a second connecting rod 225, a third connecting rod 226, and a bending rod 23. The pressing linkage assembly 21 is installed at both ends of the surface of the first base 111 in the mold base mechanism 1. The top of the pressing linkage assembly 21 contacts the bottom center of the automotive glass 6, and the pressing... The linkage component 21 is slidably connected to the center of the first mold mechanism 4. When the first support mechanism 3 is heated, the support force on the car glass 6 is removed, so that the weight of the car glass 6 presses on the top of the pressing linkage component 21, causing the pressing linkage component 21 to be driven, which drives the hot bending drive component 22 to move, and then the hot bending drive component 22 drives the bending rod 23 to bend, so that the bending rod 23 drives the first mold mechanism 4 and the second mold mechanism 5 to perform hot bending operation, thereby adapting the heated car glass 6. The damper 211 is installed in the middle of the surface of the first base 111 in the mold base mechanism 1. A toothed rod 212 is installed on the top of the damper 211, and a pressing rod 213 is provided on the top of the toothed rod 212. The pressing rod 213 is slidably connected to the center of the first mold mechanism 4. At the center of the first mold mechanism 4, the top of the pressing rod 213 contacts the bottom center of the car glass 6. The car glass 6 applies pressure to the pressing rod 213, causing it to press against the damper 211, thus displacing the rack 212. The two ends of the rack 212 mesh with one end of the first gear 215. The downward movement of the rack 212 drives the first gear 215 to rotate. The other end of the first gear 215 meshes with the right end of the second gear 216. The rotation of the first gear 215 drives the second gear 216 to rotate. The first gear 215 and the second gear 216 are mounted inside the upper part of the Y-shaped bracket 214. The Y-shaped bracket 214 is mounted on both ends of the surface of the first base 111. The Y-shaped bracket 214 can install and limit the first gear 215 and the second gear 216. The left end of the second gear 216 meshes with the third gear 217. The rotation of the second gear 216 can drive the third gear 217 to rotate. The left end of the third gear 217 meshes with the fourth gear 218. The rotation of the third gear 217 can drive the fourth gear 218 to rotate. The third gear 217 and the fourth gear 218 are mounted on both ends of the surface of the first base 111 by the bracket. One end of the pressing linkage component 21 is connected to the hot bending drive component 22. The pressing linkage component 21 drives the hot bending drive component 22 to perform bending activities. The right end of the fifth gear 221 meshes with the fourth gear 218.The rotation of the fourth gear 218 drives the fifth gear 221 to rotate. The left end of the fifth gear 221 meshes with the sixth gear 222, and the rotation of the fifth gear 221 drives the sixth gear 222 to rotate. The left end of the sixth gear 222 meshes with the seventh gear 223, and the rotation of the sixth gear 222 drives the seventh gear 223 to rotate. The fifth gear 221, sixth gear 222, and seventh gear 223 are all mounted on both ends of the surface of the first base 111 via brackets. The front and rear ends of the sixth gear 222 are connected to the first connecting rod 224, and the front and rear ends of the seventh gear 223 are connected to the second connecting rod 225. The left end of the second connecting rod 225 is rotatably connected to the outer wall of the bent rod 23. The first connecting rod 224... The left end of the 4th link is rotatably connected, and the left end of the third link 226 is rotatably connected to the outer wall of the bending rod 23. Through the rotation of the sixth gear 222 and the seventh gear 223, the first link 224, the second link 225, and the third link 226 can be driven to rotate, thereby causing the first link 224, the second link 225, and the third link 226 to move the bending rod 23. This allows the bending rod 23 to perform a hot bending operation on both ends of the first mold mechanism 4 and the second mold mechanism 5. The other end of the hot bending drive assembly 22 is connected to the bending rod 23. Driven by the hot bending drive assembly 22, the bending rod 23 can be moved, thereby causing the bending rod 23 to perform a hot bending operation on the first mold mechanism 4 and the second mold mechanism 5. The first support mechanism 3 is connected to both ends of the hot bending drive mechanism 2. The first support mechanism 3 is configured in four groups to support the automotive glass 6 before it is heated. The first support mechanism 3 includes: an arc-shaped top rod 31, a vertical rod 32, a fourth connecting rod 33, a slider 34, a tension spring 35, and a fuse 36. The arc-shaped top rod 31 is slidably connected to the front and rear ends of the first mold mechanism 4. A vertical rod 32 is located at the bottom of the arc-shaped top rod 31. The bottom of the vertical rod 32 is rotatably connected to the fourth connecting rod 33. The rear end of the fourth connecting rod 33 is rotatably connected to the slider 34. The slider 34 is slidably connected inside the groove 112 in the mold base mechanism 1. The right end of the slider 34 is connected to the tension spring 35, and the right end of the tension spring 35 is connected to the right end of the inner wall of the groove 112. The tension spring 35 can pull the arc-shaped top rod 31, thereby causing the arc-shaped top rod 6 to be bent. The push rod 31 has a downward sliding tendency. The front end of the fourth connecting rod 33 is detachably equipped with a fuse 36. The other end of the fuse 36 is detachably installed inside the first fixing groove 113 in the mold base mechanism 1. Through the connection between the fuse 36 and the first fixing groove 113, the fourth connecting rod 33 can be supported, thereby supporting the arc-shaped push rod 31. In turn, the arc-shaped push rod 31 supports the bottom two ends of the car glass 6, preventing the bottom pressure of the car glass 6 from applying pressure to the top of the pressing rod 213. When the heating operation is performed, the fuse 36 is melted and broken, thereby causing the arc-shaped push rod 31 to lose its supporting force. Under the toughness of the tension spring 35, the arc-shaped push rod 31 is pressed down by the gravity of the car glass 6, and the gravity of the car glass 6 is applied to the top of the pressing rod 213. The first mold mechanism 4 is located in the middle of the mold base mechanism 1. Both ends of the first mold mechanism 4 are connected to both ends of the hot bending drive mechanism 2. The first mold mechanism 4 bends to adapt to the heated automotive glass 6 as driven by the hot bending drive mechanism 2. The first mold mechanism 4 includes: a first arc-shaped mold 41, a central groove 42, an arc-shaped groove 43, and a first bending mold 44. The first arc-shaped mold 41 is located at the top center of the first base 111 in the mold base mechanism 1. The center of the first arc-shaped mold 41 has a central groove 42. A pressing rod 213 from the hot bending drive mechanism 2 is slidably connected inside the central groove 42. The central groove 42 can limit and guide the movement of the pressing rod 213. The first arc mold 41 has arc grooves 43 at both the front and rear ends of its top. The arc rod 31 in the first support mechanism 3 is slidably connected inside the arc groove 43. The arc groove 43 can limit and guide the movement of the arc rod 31. The first arc mold 41 is rotatably connected to the two ends of the first bending mold 44. The cooperation between the first arc mold 41 and the first bending mold 44 can support and adapt the heated automotive glass 6. The other end of the first bending mold 44 is rotatably connected to the outer wall of the bending rod 23. The movement of the bending rod 23 can drive the first bending mold 44 to perform bending operation, thereby enabling active hot bending operation of the heated automotive glass 6. The second mold mechanism 5 is connected to the front and rear ends of the first mold mechanism 4. The second mold mechanism 5 is installed at the front and rear ends of the mold base mechanism 1. The second mold mechanism 5 bends as the first mold mechanism 4 bends, and the second mold mechanism 5 also supports the automotive glass 6 before it is heated. The second mold mechanism 5 includes: a second arc mold 51, a connecting rod 52, a support frame 53, an edge support assembly 54, a second bending mold 541, a third bending mold 542, a limiting groove 543, a shaft column 544, an edge support rod 545, a torsion spring 546, a pulling rod 547, and a limiting post 548.The second arc-shaped mold 51 is connected to the front and rear ends of the first arc-shaped mold 41 in the first mold mechanism 4. The second arc-shaped mold 51 cooperates with the first mold mechanism 4 to support the heated automotive glass 6. The second arc-shaped mold 51 is configured in several groups, and the groups of second arc-shaped molds 51 are connected by connecting rods 52. Support frames 53 are installed on the outer walls of the frontmost and rearmost connecting rods 52. The bottom of the support frame 53 is installed on both ends of the surface of the second base 12 in the mold base mechanism 1. The support frame 53 can support the groups of second arc-shaped molds 51 and the first mold mechanism 4. The two ends of the second arc-shaped mold 51 are rotatably connected with edge... The supporting component 54 has its other end rotatably connected to the outer wall of the bending rod 23 in the hot bending drive mechanism 2. The movement of the bending rod 23 drives the edge supporting component 54 to actively bend, thereby enabling the edge supporting component 54 and the first bending mold 44 to perform an active hot bending operation on the automotive glass 6 during the heating process. The second bending mold 541 is rotatably connected to the rear ends of the second arc-shaped mold 51, and the front ends of the second arc-shaped mold 51 are rotatably connected to the third bending mold 542. The other ends of the second bending mold 541 and the third bending mold 542 are rotatably connected to the outer wall of the bending rod 23. The movement of the bending rod 23 enables the second bending mold to actively bend. The second bending mold 541 and the third bending mold 542 perform bending operations, thereby enabling the second bending mold 541 and the third bending mold 542 to perform a hot bending support operation on the heated automotive glass 6 together with the first bending mold 44. The inner walls of the second bending mold 541 and the third bending mold 542 are provided with limiting grooves 543. The inner side of the inner wall of the third bending mold 542 is provided with a shaft 544. The outer wall of the shaft 544 is rotatably connected to an edge support rod 545. The outer end of the edge support rod 545 can support the bottom two ends of the automotive glass 6. The two ends of the edge support rod 545 are connected to torsion springs 546. The other end of the torsion springs 546 is connected to the second bending mold 541. The inner wall of the third bending mold 542 is reinforced by a torsion spring 546, which provides resilient support to the edge support rod 545. This allows the outer end of the edge support rod 545 to provide resilient support to the bottom of the automotive glass 6, preventing the automotive glass 6 from rapidly contacting the second bending mold 541 and the third bending mold 542 during the heating process. The outer end of the edge support rod 545 is rotatably connected to a pull rod 547, and the outer end of the pull rod 547 is rotatably connected to a limit post 548. The limit post 548 is slidably connected inside the limit groove 543. Through the connection between the limit groove 543 and the limit post 548, the movement of the edge support rod 545 can be limited and guided.

[0024] In practical use, those skilled in the art connect the inner end of the fuse 36 to the first fixing groove 113, extend the arc-shaped top rod 31 out of the arc-shaped groove 43 of the first arc-shaped mold 41, and place the automotive glass 6 on top of the first mold mechanism 4 and the second mold mechanism 5. At this time, the outer ends of the arc-shaped top rod 31 and the edge support rod 545 support the bottom ends of the automotive glass 6, so that the bottom center of the automotive glass 6 contacts the top of the pressing rod 213. By smoothly pushing the automotive glass 6 into the hot bending furnace or continuous hot bending heating furnace, during the heating process, all metal parts heat up with the furnace, and the automotive glass 6 gradually softens. The fuse 36 is selected as an alloy wire that melts at a specific temperature, which is lower than the complete softening temperature of the glass but higher than the elastic deformation of the glass. When the furnace temperature reaches the melting threshold of the fuse 36, the fuse 36 melts instantly. After the fuse 36 breaks, the front end of the fourth connecting rod 33 loses its constraint. Under the restoring force of the tension spring 35, the slider 34 slides to the right along the slide groove 112. Through the fourth connecting rod 33 and the vertical rod 32, the arc-shaped top rod 31 is driven to retract downwards along the arc-shaped groove 43 until the arc-shaped top rod 31 is completely submerged in the first arc-shaped mold 41. During the retraction process, the elastic potential of the tension spring 35 causes the arc-shaped top rod 31 to slowly bend the softened automotive glass 6. The two ends of the automotive glass 6 lose their support, and the overall weight of the glass is fully applied to the top of the pressing rod 213. The pressing rod 213 bears the weight of the glass and compresses the damper 211 downwards, while simultaneously driving the toothed rod 212 downwards at a constant speed. As the glass descends, damper 211 controls the descent speed to prevent impact cracks caused by rapid glass drop. When rack 212 moves downwards, its two sides engage the first gear 215, driving the first gear 215 to rotate clockwise from one side. The first gear 215 drives the second gear 216 to rotate counterclockwise, the second gear 216 drives the third gear 217 to rotate clockwise, the third gear 217 drives the fourth gear 218 to rotate counterclockwise, the fourth gear 218 drives the fifth gear 221 to rotate clockwise, the fifth gear 221 drives the sixth gear 222 to rotate counterclockwise, and the sixth gear 222 drives the seventh gear 223 to rotate clockwise. The rotation of the sixth gear 222 and the seventh gear 223 respectively drives the first connecting rod 224, the second connecting rod 225, and the third connecting rod 226. As rod 226 swings, the left ends of these connecting rods collectively push the bending rod 23 to bend inward. Because the bending rod 23 is elastic and its ends are free, its middle section arches upward under the push of the connecting rods, while its ends contract downward and inward. The bending motion of the bending rod 23 simultaneously drives the first bending mold 44, the second bending mold 541, and the third bending mold 542 to rotate around their respective rotational connection points, causing the arc surfaces of these molds to gradually rise and approach the bottom of the automotive glass 6. Simultaneously, the limiting post 548 in the edge support assembly 54 slides inward along the limiting groove 543, and the edge support rod 545 gradually flattens with the assistance of the torsion spring 546, providing continuous but flexible support to the glass edge. Under the combined action of the glass's own weight and the upward bending motion of the lower mold,The softened car glass 6 gradually conforms to the final curved surface formed by the first arc mold 41, the first bending mold 44, the second arc mold 51, the second bending mold 541, and the third bending mold 542. The entire bending process is adaptive: the deeper the glass is pressed down, the more the toothed rod 212 descends, the greater the bending degree of the bending rod 23 pushed by the connecting rod, and the greater the bending angle of the mold, until the glass completely conforms to the mold. When the pressing rod 213 descends to its lowest position, the bending deformation of the bending rod 23 reaches its maximum value, and the first bending mold 44 and the second and third bending molds both rotate to the preset final bending angle. To adjust the curvature, maintain the furnace temperature above the softening point for 5-15 minutes to allow the internal stress of the glass to fully relax and set. Then, begin cooling according to process requirements: first, slowly reduce the temperature to the annealing temperature range at 1-3℃ / min, then allow it to cool in the furnace or rapidly. During cooling, keep the mold bent to prevent the glass from springing back. When the glass temperature drops below 80℃, open the furnace door and remove the mold and finished glass. At this point, the automotive glass 6 has been formed into the required curved shape. Finally, carefully remove the finished glass from the mold. Because the glass has hardened and the mold has a split structure, it can usually be removed directly upwards.

[0025] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hot bending die for automotive glass processing, comprising: Mold base mechanism and automotive glass, the mold base mechanism being placed on the ground, characterized in that: A hot bending drive mechanism is placed on top of the mold base mechanism. The hot bending drive mechanism autonomously bends the heated automotive glass. The two ends of the hot bending drive mechanism are connected to the first support mechanism, which is set into four groups. The first support mechanism supports the automotive glass before it is heated. The middle of the mold base mechanism is provided with the first mold mechanism. The two ends of the first mold mechanism are connected to the two ends of the hot bending drive mechanism. The first mold mechanism bends to adapt to the heated automotive glass as it is driven by the hot bending drive mechanism. The front and rear ends of the first mold mechanism are connected to the second mold mechanism. The second mold mechanism is installed at the front and rear ends of the mold base mechanism. The second mold mechanism bends as the first mold mechanism bends, and the second mold mechanism also supports the automotive glass before it is heated.

2. The hot bending die for automotive glass processing according to claim 1, characterized in that, The mold base mechanism includes: a mold base assembly; The mold base assembly is placed on the ground. The front and rear ends of the mold base assembly are connected to a third base. The front and rear ends of the third base are connected to a second base. A support seat is installed on the surface of the third base. The support seat is also installed on the left and right ends of the surface of the second base.

3. The hot bending die for automotive glass processing according to claim 2, characterized in that, The mold base assembly includes: a first base; The first base is placed on the ground and is located in the middle of the second base. The front and rear sides of the first base are provided with sliding grooves, and the inner side of the sliding groove is provided with a first fixing groove. The first fixing groove is located on the front and rear sides of the first base.

4. The hot bending die for automotive glass processing according to claim 3, characterized in that, The hot bending drive mechanism includes: a pressing linkage component; The pressing linkage assembly is installed at both ends of the surface of the first base in the mold base mechanism. The top of the pressing linkage assembly contacts the bottom center of the car glass. The pressing linkage assembly is slidably connected to the center of the first mold mechanism. One end of the pressing linkage assembly is connected to the hot bending drive assembly, and the other end of the hot bending drive assembly is connected to the bending rod.

5. A hot bending die for automotive glass processing according to claim 4, characterized in that, The pressing linkage component includes: a damper; The damper is installed in the middle of the surface of the first base in the mold base mechanism. A rack is installed on the top of the damper, and a pressing rod is provided on the top of the rack. The pressing rod is slidably connected to the center of the first mold mechanism. The top of the pressing rod contacts the bottom center of the car glass. The two ends of the rack are meshed with one end of the first gear, and the other end of the first gear is meshed with the right end of the second gear. The first gear and the second gear are installed inside the upper end of the Y-shaped bracket. The Y-shaped bracket is installed on both ends of the surface of the first base. The left end of the second gear is meshed with the third gear, and the left end of the third gear is meshed with the fourth gear. The third gear and the fourth gear are installed on both ends of the surface of the first base through the bracket.

6. A hot bending die for automotive glass processing according to claim 5, characterized in that, The hot bending drive assembly includes: a fifth gear; The right end of the fifth gear meshes with the fourth gear, the left end of the fifth gear meshes with the sixth gear, and the left end of the sixth gear meshes with the seventh gear. The fifth, sixth, and seventh gears are all mounted on both ends of the surface of the first base via brackets. The front and rear ends of the sixth gear are connected to the first connecting rod, and the front and rear ends of the seventh gear are connected to the second connecting rod. The left end of the second connecting rod is rotatably connected to the outer wall of the curved rod, and the left end of the first connecting rod is rotatably connected to the outer wall of the curved rod. The left end of the third connecting rod is rotatably connected to the outer wall of the curved rod.

7. A hot bending die for automotive glass processing according to claim 6, characterized in that, The first support mechanism includes: an arc-shaped top rod; The arc-shaped ejector pin is slidably connected to the front and rear ends of the first mold mechanism. The bottom of the arc-shaped ejector pin is provided with a vertical rod. The bottom of the vertical rod is rotatably connected to the fourth connecting rod. The rear end of the fourth connecting rod is rotatably connected to the slider. The slider is slidably connected to the inside of the slide groove in the mold base mechanism. The right end of the slider is connected to the tension spring. The right end of the tension spring is connected to the right end of the inner wall of the slide groove. The front end of the fourth connecting rod is detachably equipped with a fuse. The other end of the fuse is detachably installed inside the first fixed groove in the mold base mechanism.

8. A hot bending die for automotive glass processing according to claim 7, characterized in that, The first mold mechanism includes: a first arc-shaped mold; The first arc-shaped mold is set at the top center of the first base in the mold base mechanism. The center of the first arc-shaped mold has a central groove. The pressing rod of the hot bending drive mechanism is slidably connected inside the central groove. The front and rear ends of the top of the first arc-shaped mold are provided with arc-shaped grooves. The arc-shaped top rod of the first support mechanism is slidably connected inside the arc-shaped grooves. The two ends of the first arc-shaped mold are rotatably connected to the first bending mold. The other end of the first bending mold is rotatably connected to the outer wall of the bending rod.

9. A hot bending die for automotive glass processing according to claim 8, characterized in that, The second mold mechanism includes: a second arc-shaped mold; The second arc-shaped mold is connected to the front and rear ends of the first arc-shaped mold in the first mold mechanism. The second arc-shaped mold is set in several groups, and the several groups of second arc-shaped molds are connected by connecting rods. The outer walls of the frontmost connecting rod and the rearmost connecting rod are equipped with support frames. The bottom of the support frames is installed on both ends of the surface of the second base in the mold base mechanism. The two ends of the second arc-shaped mold are rotatably connected to edge support components. The other end of the edge support components is rotatably connected to the outer wall of the bending rod in the hot bending drive mechanism. The edge support assembly includes: a second bending mold; The second bending mold is rotatably connected to the rear sides of both ends of the second arc-shaped mold. The front sides of both ends of the second arc-shaped mold are rotatably connected to the third bending mold. The other ends of the second bending mold and the third bending mold are rotatably connected to the outer wall of the bending rod. The inner walls of the second bending mold and the third bending mold are both provided with limiting grooves. The inner side of the inner wall of the third bending mold is provided with a shaft column. The outer wall of the shaft column is rotatably connected to an edge support rod. The two ends of the edge support rod are connected to torsion springs. The other end of the torsion springs is connected to the inner side of the inner wall of the second bending mold and the third bending mold. The outer end of the edge support rod is rotatably connected to a pulling rod. The outer end of the pulling rod is rotatably connected to a limiting post. The limiting post is slidably connected inside the limiting groove.

10. A method for operating a hot bending die for automotive glass processing as described in claims 1-9, characterized in that, The following steps are included: S1: Connect the inner end of the fuse wire to the first fixing groove, extend the arc-shaped push rod out of the arc-shaped groove of the first arc-shaped mold, and place the car glass on the top of the first mold mechanism and the second mold mechanism. At this time, the outer ends of the arc-shaped push rod and the edge support rod support the bottom two ends of the car glass, so that the bottom center of the car glass contacts the top of the pressing rod. S2: By smoothly pushing the automotive glass into a hot bending furnace or a continuous hot bending heating furnace, during the heating process, all metal parts heat up with the furnace, and the automotive glass gradually softens. The fuse is an alloy wire that melts at a specific temperature, which is lower than the complete softening temperature of the glass but higher than the elastic deformation temperature of the glass. When the furnace temperature reaches the melting threshold of the fuse, the fuse melts instantly. After the fuse breaks, the front end of the fourth link loses its constraint. Under the restoring force of the tension spring, the slider slides to the right along the slide groove. Through the fourth link and the vertical rod, the arc-shaped top rod is driven to retract downward along the arc groove until the arc-shaped top rod is completely submerged in the first arc mold. During the retraction process, the elastic potential of the tension spring causes the arc-shaped top rod to slowly bend the softened automotive glass. S3: With both ends of the car window unsupported, the entire weight of the glass acts on the top of the pressing rod. The pressing rod bears the weight of the glass, compressing the damper downwards and simultaneously causing the rack to descend at a constant speed. The damper controls the descent speed to prevent the glass from falling too quickly and causing impact cracks. As the rack moves downwards, the racks on both sides mesh with the first gear, driving the first gear to rotate clockwise from one side. The first gear drives the second gear to rotate counterclockwise, the second gear drives the third gear to rotate clockwise, the third gear drives the fourth gear to rotate counterclockwise, the fourth gear drives the fifth gear to rotate clockwise, the fifth gear drives the sixth gear to rotate counterclockwise, and the sixth gear drives the seventh gear to rotate clockwise. The rotation of the sixth and seventh gears respectively causes the first, second, and third connecting rods to swing. The left ends of these connecting rods... As the bending rod is pushed, it undergoes inward bending deformation. Due to the elasticity of the bending rod and the freedom of both ends, the middle part arches upward under the push of the connecting rod, while the two ends contract downward and inward. The bending motion of the bending rod simultaneously drives the first bending mold, the second bending mold, and the third bending mold to rotate around their respective rotation connection points, causing the arc surfaces of these molds to gradually rise and approach the bottom of the car glass. At the same time, the limiting post in the edge support assembly slides inward along the limiting groove, and the edge support rod gradually flattens with the assistance of the torsion spring, providing continuous but flexible support for the edge of the glass. Under the combined action of the glass's own weight and the upward bending motion of the lower mold, the softened car glass gradually conforms to the final curved surface formed by the first arc mold, the first bending mold, the second arc mold, the second bending mold, and the third bending mold. S4: The entire bending process is adaptive: the deeper the glass is pressed down, the more the toothed rod descends, the greater the degree of bending of the bending rod pushed by the connecting rod, and the greater the bending angle of the mold, until the glass completely fits the mold. When the pressing rod descends to the lowest position, the bending deformation of the bending rod reaches its maximum value. The first bending mold and the second and third bending molds all rotate to the preset final bending angle. At this time, the furnace temperature is kept above the softening point for 5 to 15 minutes to allow the internal stress of the glass to fully relax and set. S5: Start cooling according to process requirements: First, slowly reduce the temperature to the annealing temperature range at 1~3℃ / min, then cool with the furnace or cool rapidly. During the cooling process, keep the mold in a bent state to prevent the glass from springing back. When the glass temperature drops below 80℃, open the furnace door and take out the mold and finished glass. At this time, the automotive glass has been formed into the required bent shape. Finally, carefully remove the finished glass from the mold. Since the glass has hardened and the mold is a split structure, it can usually be taken out directly upwards.

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