Automatic heat treatment equipment for glass substrate

Abstract

The invention discloses automatic heat treatment equipment for a glass substrate, and relates to the technical field of glass processing equipment.The automatic heat treatment equipment comprises a hot bending die, the hot bending die comprises a fixed die and a movable die which can be opened and closed, the fixed die comprises a die holder, and a die cavity with an arc-shaped vertical section is formed in the die holder; the air cavity is formed in the die holder, a plurality of air blowing holes communicated with the air cavity are distributed in the bottom surface of the die cavity, and a valve groove is formed in the middle of each air blowing hole in a cut-off mode; the valve plate is arranged in the valve groove and can slide along the inner wall of the valve groove in an airtight mode, and communicating holes corresponding to the blowing holes in a one-to-one mode are formed in the valve plate. Compared with an ejector rod mode, formed glass is more softly and progressively jacked, air pressure thrust is evenly distributed at the bottom of the formed glass, the formed glass is gradually separated from a mold cavity, the product quality problem caused by mold taking is reduced, and the product percent of pass is increased.

Description

Technical Field

[0001] The invention relates to the technical field of glass processing equipment, in particular to automatic heat treatment equipment for glass substrates. Background Art

[0002] In the field of glass processing, especially in the manufacturing process of curved glass, hot bending is a key link. At present, the existing glass hot bending equipment has many technical difficulties and limitations in the mold-taking process of the molded product.

[0003] The traditional glass hot bending process requires cooling and solidification after the product is formed, and then relies on manual mold removal. As the design of glass products develops towards thin-walled configurations, thin-walled glass is tightly trapped in the mold cavity after hot bending, and manual mold removal faces great challenges. Due to the thin glass wall, it is difficult to apply force accurately during manual operation, and it is easy to cause glass breakage, scratches or other appearance defects due to uneven or excessive force. At the same time, the mold removal efficiency is low, which seriously restricts the expansion of production scale and the improvement of production efficiency.

[0004] In order to overcome the difficulties of manual mold removal, a technical improvement plan using a liftable ejector pin to eject the molded product has emerged. This method has reduced the reliance on manual operating skills to a certain extent and improved the degree of automation of mold removal.

[0005] However, the ejection of molded products by ejector pins requires that the product is below a certain temperature and has completed solidification. This is because, when the glass has not yet fully solidified, its internal structure is still in an unstable state, and the strength and rigidity of the material are not enough to withstand the lifting force of the ejector pin. If the glass product is forcibly ejected when it is above this critical temperature and has not yet completed solidification, the bottom of the glass product will inevitably be deformed due to uneven external forces, and it will not be able to meet the stringent requirements of curved glass for shape accuracy and surface flatness. Therefore, in order to ensure product quality, equipment designers often have to subjectively extend the cooling and solidification time when planning the process, which directly leads to a significant extension of the product's injection molding production cycle. In the modern high-speed production and rapid iteration industrial environment, a longer production cycle means that the company is at a disadvantage in market competition and increases production costs.

[0006] In addition, the cross-sectional area of ​​the jacking rod is usually small. During the lifting process, the small contact area causes the lifting force to be concentrated on a local area of ​​the bottom surface of the product. For curved glass with high quality requirements, this concentrated lifting force can easily cause damage to the bottom surface of the product, affecting the appearance quality of the curved glass.

[0007] In view of this, this application is hereby filed. Summary of the invention

[0008] The object of the present invention is to provide an automatic heat treatment device for a glass substrate to solve the problems raised in the above background technology.

[0009] In order to solve the above technical problems, the present invention provides an automatic heat treatment device for a glass substrate, comprising a heat bending mold, wherein the heat bending mold comprises a fixed mold and a movable mold that can be opened and closed, wherein the fixed mold comprises a mold base, and a mold cavity with an arc-shaped vertical section is arranged on the mold base, and further comprises; An air cavity is provided in the mold base, a plurality of blowing holes connected to the air cavity are distributed on the bottom surface of the mold cavity, and a valve groove is provided in the middle of the blowing hole in a truncated manner; The valve plate is arranged in the valve groove and can slide airtightly along the inner wall of the valve groove. The valve plate is provided with connecting holes corresponding to the blowing holes one by one.

[0010] Furthermore, the valve plate further comprises: The arc plate is slidably arranged inside the valve groove, and the communication hole is penetrated and opened on the arc plate; The sealing strip is connected to both ends of the arc plate and slides inside the valve groove in a sealed manner; The arc plate is composed of three arc-shaped pieces that are fitted together, the arc-shaped piece in the middle is fixed to the middle of one of the sealing strips, and the arc-shaped pieces on both sides are fixedly connected to another sealing strip.

[0011] Furthermore, the fixed mold also includes The sliding tube is open at both ends, and the top end is connected with a suction plate in a trumpet-shaped structure. The sliding tube is arranged inside the blowing hole as a whole and can slide along the axial direction of the blowing hole. A negative pressure tube is sealed at one end and open at the other end. A plurality of negative pressure ports distributed along the circumference of the negative pressure tube are provided on the side wall of the negative pressure tube near the sealed end. The sealed end of the negative pressure tube extends from the bottom end of the sliding tube into the sliding tube. A negative pressure groove corresponding to the blowing holes is provided on the inner top wall of the valve groove. The open end of the negative pressure tube extends into the negative pressure groove. Among them, a pull plate is airtightly and slidably provided inside the negative pressure groove, a connecting rod is connected to one side of the pull plate, and an end of the connecting rod away from the pull plate is fixed to the top surface of the arc plate.

[0012] Furthermore, a receiving groove adapted to the shape of the adsorption plate is provided at the port at the top of the blowing hole, and a reducing groove coaxial with the blowing hole is provided on the mold base, the aperture of the reducing groove is larger than the blowing hole, and a supporting spring is provided inside the reducing groove, one end of the supporting spring is fixed to the bottom wall of the reducing groove, and the other end of the supporting spring is fixed to the outer wall of the sliding tube.

[0013] Furthermore, it also includes a trigger assembly arranged on the mold base for triggering the valve plate to slide when the mold is closed. The trigger component comprises: The sealing cavity is vertically opened on the mold base and distributed in a rectangular array at the four corners of the mold base; a sealing plate is provided inside the sealing cavity for sealing and sliding; A follower rod, one end of which is connected to the center of the top surface of the sealing plate, and the other end of which extends vertically upward and is connected to the bearing plate; The communicating groove is arranged in the mold base, one end of which is communicated with the inside of the sealing cavity, and the communicating end with the sealing cavity is located above the sealing plate, and the other end is communicated with the valve groove.

[0014] Furthermore, a tension spring is sleeved on the outside of the follower rod, the top end of the tension spring is fixedly connected to the inner top wall of the sealing cavity, and the bottom end of the tension spring is fixedly connected to the top surface of the sealing plate.

[0015] Furthermore, an adjustment plate is airtightly and slidably installed inside the air cavity, and an adjustment screw is rotatably connected to the center of the bottom surface of the adjustment plate. The adjustment screw is threadedly connected to the mold base, and its bottom end extends to the bottom of the mold base and is connected to a knob.

[0016] Furthermore, it also includes a bottom plate, the top of which is provided with a support assembly for supporting the movable mold above the fixed mold, the support assembly including A plurality of vertical rods are distributed around the mold base in a rectangular array, with the head ends connected to the top surface of the bottom plate, and the tail ends extending vertically upward from the top surface of the bottom plate and connected to the top plate; The hydraulic cylinder is connected to the bottom surface of the top plate, and the telescopic end of the hydraulic cylinder is connected to a lifting plate; the lifting plate is slidably connected to the vertical rod, and the movable mold is installed on the bottom surface of the lifting plate.

[0017] Furthermore, it also includes an air supply component for filling the air cavity with air flow, and the air supply component includes: The sleeve is vertically fixed on the top surface of the bottom plate and is located at the rear side of the die base, and a piston plate is arranged inside the sleeve and can slide in a sealing manner along its axial direction; A piston rod, one end of which is connected to the top surface of the piston plate, and the other end of which passes through the side wall of the sleeve and extends upward and is fixedly connected to the bottom surface of the lifting plate; An air inlet pipe, one end of which is connected to a side wall of the sleeve and communicated with the sleeve, an air inlet check valve is installed inside the pipe, and the other end of the pipe is communicated with the outside world; The air outlet pipe has one end connected to the other side wall of the sleeve and communicated with the sleeve, an air outlet one-way valve is installed inside the air outlet pipe, and the other end extends to the inside of the air cavity and is fixed on the adjustment plate.

[0018] Furthermore, it also includes a heating component for heating the glass substrate, the heating component includes a heating cover symmetrically slidably arranged on the bottom plate, the inner top wall of the heating cover is provided with an electric heating element, and when the two heating covers are relative to each other, they are covered outside the mold base.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is connected with the mold cavity through the blowing hole on the bottom surface of the mold cavity, and the valve plate is arranged in the valve groove in the middle of the blowing hole and can slide airtightly. In the initial state, the connecting hole on the valve plate is misaligned with the blowing hole to prevent gas circulation. When it is necessary to remove the mold, the valve plate is slid through external control to align the connecting hole with the blowing hole, and the gas in the air cavity can be blown out through the blowing hole to act on the glass substrate to assist it to be separated from the mold cavity; the demolding of the molded glass assisted by the action of gas is gentler than that of the ejector rod method, and the molded glass is lifted step by step. The air pressure thrust is evenly distributed on the bottom of the molded glass, so that the molded glass is gradually separated from the mold cavity, reducing product quality problems caused by demolding and improving the product qualification rate.

[0020] 2. In the present invention, the glass will come into contact with the adsorption plate during the hot bending process. The adsorption plate in a negative pressure state adsorbs the glass substrate that has been bent during the hot bending process, thereby playing an auxiliary positioning effect. During the hot bending process, the glass can be better fitted to the shape of the mold cavity by gradually adsorbing the glass with the curvature. During the hot bending process, reasonable gradual adsorption can make the stress evenly distributed on the entire glass surface. Such uniform stress distribution can improve the strength and impact resistance of the glass, reduce the risk of glass breakage due to stress concentration during use, and extend the service life of glass products.

[0021] 3. In the present invention, when the gas in the air cavity is blown out through the blowing hole, the bottom contour and position of the adsorption plate effectively block and guide the airflow, so that the gas blown toward the glass is fan-shaped and dispersed in all directions. The fan-shaped airflow can cover a large area of ​​the bottom surface of the glass substrate to be demolded, thereby increasing the contact area between the gas and the bottom surface of the glass substrate, avoiding quality problems such as cracking, scratching or deformation of the glass substrate due to excessive local force, and the evenly distributed demolding force can more efficiently overcome the adhesion between the glass substrate and the mold cavity, so that the glass substrate can be more steadily and smoothly separated from the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front structural schematic diagram of the present invention; Figure 2 It is a side view structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the heating component in the present invention; Figure 4 It is a rear view structural schematic diagram of the present invention; Figure 5 For along Figure 4 Schematic diagram of the cross-section structure along the middle section line AA; Figure 6 It is a front view structural schematic diagram of the fixed mold in the present invention; Figure 7It is a schematic diagram of the top view of the fixed mold in the present invention; Figure 8 For along Figure 7 Schematic diagram of the cross-sectional structure along the middle section line BB; Fig. 9 For along Figure 7 Schematic diagram of the cross-sectional structure along the center section line CC; Fig.10 It is a structural schematic diagram of the valve plate in the present invention; Fig.11 for Fig. 9 A magnified view of the structure at center.

[0023] In the figure: 1. Bottom plate; 2. Heating assembly; 21. Support rod; 22. Heating cover; 23. Slide; 24. Slide seat; 25. Bidirectional screw; 26. Driving motor; 27. Synchronous wheel; 28. Synchronous belt; 29. ​​Avoidance groove; 210. Guide rod; 211. Return spring; 3. Fixed mold; 31. Support plate; 32. Mold base; 33. Mold cavity; 34. Air cavity; 35. Valve slot; 36. Valve plate; 361. Arc plate; 362. Sealing strip; 363. Connecting hole; 364. Connecting rod; 365. Pull plate; 37. Adjusting plate; 38. Blowing hole; 39. Accommodating groove; 310. Variable diameter groove; 311. Support spring; 312. Adsorption plate; 313. Sliding tube; 314. Negative pressure tube; 315. Negative pressure port; 316. Negative pressure groove; 317. Sealing cavity; 318. Sealing plate; 319. Follower rod; 320. Loading plate; 321. Tension spring; 322. Connecting groove; 323. Adjusting screw; 4. Support assembly; 41. Vertical pole; 42. Top plate; 43. Hydraulic cylinder; 44. Lifting plate; 5. Moving mold; 6. Air supply assembly; 61. Sleeve; 62. Piston plate; 63. Piston rod; 64. Air inlet pipe; 65. Air inlet check valve; 66. Air outlet pipe; 67. Air outlet check valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 11The present invention provides a technical solution: an automatic heat treatment device for a glass substrate, comprising a heat bending mold, the heat bending mold comprising a fixed mold 3 and a movable mold 5 that can be opened and closed, the fixed mold 3 comprising a mold base 32, a mold cavity 33 with an arc-shaped vertical section is arranged on the mold base 32, and further comprising; The air cavity 34 is provided in the mold base 32. A plurality of blowing holes 38 communicating with the air cavity 34 are distributed on the bottom surface of the mold cavity 33. A valve groove 35 is provided in a cut-off manner in the middle of the blowing hole 38. The valve plate 36 is disposed in the valve groove 35 and can slide airtightly along the inner wall of the valve groove 35 . The valve plate 36 is provided with communication holes 363 corresponding to the blowing holes 38 one by one.

[0026] Specifically, the air cavity 34 is provided in the mold base 32, and is connected to the mold cavity 33 through the air blowing hole 38 on the bottom surface of the mold cavity 33. The valve plate 36 is arranged in the valve groove 35 in the middle of the air blowing hole 38 and can slide airtightly. In the initial state, the connecting hole 363 on the valve plate 36 is misaligned with the air blowing hole 38 to prevent the gas from flowing. When the mold needs to be removed, the valve plate 36 is slid by external control to align the connecting hole 363 with the air blowing hole 38, and the gas in the air cavity 34 can be blown out through the air blowing hole 38 to act on the glass substrate and assist it to be separated from the mold cavity 33. The upper mold removal auxiliary structure is adopted, through the action of gas, compared with the traditional manual or ejector mold removal method, it can apply force to the glass substrate more evenly, reduce the risk of damage to the glass substrate, and is especially suitable for thin-walled glass substrates, reduce product quality problems caused by mold removal, and improve product qualification rate.

[0027] It should be noted that the fixed mold 3 and the movable mold 5 have a closed mold state and an open mold state. In the closed mold state, the movable mold 5 is pressed into the mold cavity 33 opened on the fixed mold 3, and then the glass substrate placed on the top surface of the fixed mold 3 can be pressed into the mold cavity 33, thereby achieving the effect of bending the glass substrate.

[0028] See also Figure 8-Figure 11 , the valve plate 36 also includes; The arc plate 361 is slidably disposed inside the valve slot 35, and the communication hole 363 is penetrated and opened thereon; The sealing strip 362 is connected to both ends of the arc plate 361 and slides inside the valve groove 35 in a sealed manner; The arc plate 361 is composed of three arc-shaped pieces that are attached to each other. The arc-shaped piece in the middle is fixed to the middle of one of the sealing strips 362 , and the arc-shaped pieces on both sides are fixedly connected to another sealing strip 362 .

[0029] Specifically, the arc plate 361, as the main part of the valve plate 36, slides in the valve groove 35, and the sealing strips 362 at both ends ensure air tightness. The arc plate 361 is composed of three arc-shaped pieces. This structural design enables the arc plate 361 to slide in the valve groove 35 in an opening and closing manner, so as to ensure that the valve plate 36 can better adapt to the air pressure changes in the valve groove 35 and its own movement requirements, reduce jamming and air leakage, and when the valve plate 36 slides, the connecting hole 363 moves accordingly to correspond to or stagger with the blowing hole 38, thereby realizing the on-off control of the air path; further ensuring the reliability of the blowing operation during the mold removal process, and helping to improve the stability and efficiency of the overall operation of the equipment.

[0030] See also Fig.11 , the fixed mold 3 also includes; The sliding tube 313 is open at both ends, and the top end thereof is connected to a suction plate 312 having a trumpet-shaped structure. The sliding tube 313 is disposed inside the blowing hole 38 as a whole and can slide axially along the blowing hole 38. The negative pressure tube 314 is blocked at one end and open at the other end. A plurality of negative pressure ports 315 distributed along the circumference of the negative pressure tube 314 are provided on the side wall near the blocked end. The blocked end of the negative pressure tube 314 extends from the bottom end of the sliding tube 313 into the sliding tube 313. A negative pressure groove 316 corresponding to the blowing holes 38 is provided on the inner top wall of the valve groove 35. The open end of the negative pressure tube 314 extends to the inside of the negative pressure groove 316. A pull plate 365 is airtightly and slidably provided inside the negative pressure groove 316 , a connecting rod 364 is connected to one side of the pull plate 365 , and one end of the connecting rod 364 away from the pull plate 365 is fixed to the top surface of the arc plate 361 .

[0031] A accommodating groove 39 that matches the shape of the adsorption plate 312 is arranged at the port at the top of the blowing hole 38, and a reducing groove 310 that is coaxial with the blowing hole 38 is arranged on the mold base 32. The aperture of the reducing groove 310 is larger than the blowing hole 38, and a supporting spring 311 is arranged inside the reducing groove 310. One end of the supporting spring 311 is fixed to the inner bottom wall of the reducing groove 310, and the other end of the supporting spring 311 is fixed to the outer wall of the sliding tube 313.

[0032] Specifically, the sliding tube 313 and the adsorption plate 312 are arranged in the blowing hole 38. Initially, under the action of the supporting spring 311, they are at a certain position extending out of the blowing hole 38, and the end of the negative pressure tube 314 extends into the sliding tube 313. During the thermal bending process, the glass will contact the adsorption plate 312, and as the glass is gradually thermally bent, the glass will eventually press down the adsorption plate 312 to drive the sliding tube 313 to slide into the blowing hole 38. As the sliding tube 313 slides, part of the negative pressure tube 314 extends into the sliding tube 313, so that the negative pressure port 315 is connected to the inside of the sliding tube 313. At the same time, the valve plate 36 will also slide synchronously. The sliding of the valve plate 36 will drive the pull plate 365 to slide in the negative pressure groove 316 through the connecting rod 364. During the sliding of the pull plate 365, the gas inside the negative pressure tube 314 will be The air pressure in the negative pressure tube 314 is changed by pumping it into the negative pressure groove 316, so that negative pressure is formed in the negative pressure tube 314. Since the negative pressure tube 314 is connected with the sliding tube 313 through the negative pressure port 315, negative pressure is generated synchronously between the sliding tube 313 and the adsorption plate 312. The adsorption plate 312 in a negative pressure state adsorbs the glass substrate that has been bent during the hot bending process, thereby playing an auxiliary positioning effect. During the hot bending process of the glass, the glass can be better fitted to the shape of the mold cavity 33 by gradually adsorbing the glass with the curvature. During the hot bending process, reasonable gradual adsorption can make the stress evenly distributed on the entire glass surface. Such uniform stress distribution can improve the strength and impact resistance of the glass, reduce the risk of glass breakage due to stress concentration during use, and extend the service life of the glass products.

[0033] As a further effect: when the device is in the demoulding preparation stage, the support spring 311 is in a naturally stretched state or is only slightly compressed, and the elastic force generated by the support spring 311 pushes the sliding tube 313 to move upward along the axial direction of the blowing hole 38. Since the suction plate 312 is connected to the top of the sliding tube 313, the suction plate 312 also moves upward and extends a certain distance from the blowing hole 38; At this time, when the gas in the air cavity 34 is blown out through the blowing hole 38, the bottom contour and position of the adsorption plate 312 have an effective blocking and guiding effect on the airflow. Because the adsorption plate 312 is a trumpet-shaped structure, and its bottom has a certain curvature and area, the gas cannot be sprayed straight upward after encountering the adsorption plate 312, but changes the flow direction along the bottom curved surface of the adsorption plate 312 and spreads out in a fan shape. This fan-shaped airflow can cover a large area of ​​the bottom surface of the glass substrate to be demolded. Compared with the traditional single-point or small-area air jet method, the contact area between the gas and the bottom surface of the glass substrate is greatly increased. On the one hand, The larger contact area makes the demoulding force applied by the gas to the glass substrate more evenly distributed, avoiding quality problems such as cracking, scratching or deformation of the glass substrate due to excessive local force, and effectively protecting the integrity and precision of the glass substrate. On the other hand, the evenly distributed demoulding force can more efficiently overcome the adhesion between the glass substrate and the mold cavity 33, so that the glass substrate can be more smoothly and smoothly separated from the mold cavity 33, which significantly improves the success rate and efficiency of demoulding, reduces the time and energy consumption required for demoulding, thereby improving the production efficiency of the entire glass substrate heat treatment equipment and meeting the needs of large-scale and high-quality production.

[0034] It should be noted that the accommodating groove 39 at the top of the blowing hole 38 provides a suitable accommodating space for the adsorption plate 312, so that it can move stably during adsorption and release operations. The setting of the reducing groove 310 and the supporting spring 311 determines the initial position and movement range of the sliding tube 313. When the air pressure changes or is acted upon by external force, the sliding tube 313 can slide axially in the blowing hole 38, thereby driving the adsorption plate 312 to achieve adsorption and release actions.

[0035] See also Figure 6-Figure 8 , and also includes a trigger assembly disposed on the mold base 32 for triggering the valve plate 36 to slide when the mold is closed, The trigger components include, The sealing cavity 317 is vertically opened on the mold base 32 and distributed in a rectangular array at the four corners of the mold base 32; a sealing plate 318 is provided inside the sealing cavity 317 for sealing and sliding; A follower rod 319, one end of which is connected to the center of the top surface of the sealing plate 318, and the other end of which extends vertically upward and is connected to the bearing plate 320; The communication groove 322 is provided in the mold base 32 , one end of which is communicated with the inside of the sealing cavity 317 , and the communication end with the sealing cavity 317 is located above the sealing plate 318 , and the other end of which is communicated with the valve groove 35 .

[0036] Specifically, when the mold is closed, the movable mold 5 contacts the fixed mold 3 and squeezes the supporting plate 320. The supporting plate 320 drives the follower rod 319 and the sealing plate 318 to slide downward in the sealing cavity 317. The space of the sealing cavity 317 above the sealing plate 318 becomes larger, and the gas enters the connecting groove 322 through the valve groove 35 and then enters the sealing cavity 317, so that a negative pressure is formed in the valve groove 35. The negative pressure is used to push the valve plate 36 to slide, thereby realizing the conduction of the gas path; the trigger component automatically triggers the sliding of the valve plate 36 by the mold closing action, realizing the linkage between the mold closing and the mold removal auxiliary structure action, without the need for additional complex control devices, simplifying the overall structure and control process of the equipment, improving the degree of automation and operational convenience of the equipment, and reducing errors and failures that may be caused by human intervention.

[0037] See also Figure 8 The outer sleeve of the follower rod 319 is provided with a tension spring 321 , the top end of the tension spring 321 is fixedly connected to the inner top wall of the sealing cavity 317 , and the bottom end of the tension spring 321 is fixedly connected to the top surface of the sealing plate 318 .

[0038] Specifically, the tension spring 321 is sleeved on the follower rod 319, one end of which is connected to the top wall of the sealing chamber 317, and the other end is connected to the sealing plate 318. Before the mold is closed, the tension spring 321 is in a compressed state, exerting an upward pulling force on the sealing plate 318. When the mold is closed, the tension spring 321 is stretched. When the mold is opened, the tension spring 321 can pull the sealing plate 318 to reset upward, so that the air pressure in the sealing chamber 317 returns to its initial state, and the valve plate 36 is also reset accordingly, closing the air circuit to prepare for the next cycle, thereby ensuring the automatic reset function of the trigger component, enabling the equipment to stably perform periodic work, improving the reliability and stability of the equipment, reducing the workload of equipment maintenance and debugging, and facilitating the application of the equipment in long-term continuous production.

[0039] See also Figure 5 and Fig. 9 An adjusting plate 37 is air-tightly slidably installed inside the air cavity 34, and an adjusting screw 323 is rotatably connected to the center of the bottom surface of the adjusting plate 37. The adjusting screw 323 is threadedly connected to the mold base 32, and its bottom end extends to the bottom of the mold base 32 and is connected to a knob.

[0040] Specifically, the adjustment plate 37 is airtightly slidably installed in the air cavity 34, and the adjustment plate 37 can be moved up and down by rotating the adjustment screw 323. When the adjustment plate 37 moves upward, the upper space of the air cavity 34 is reduced, and the air pressure is increased, so that the pressure of the gas blown out of the blowing hole 38 can be increased; conversely, when the adjustment plate 37 moves downward, the upper space of the air cavity 34 is increased, the air pressure is reduced, and the pressure of the gas blown out of the blowing hole 38 is reduced; the blowing pressure can be flexibly adjusted according to the material, shape, thickness and other characteristics of different glass substrates and the production process requirements, ensuring that appropriate force is applied to the glass substrate during the mold removal process, which not only ensures that the mold can be removed smoothly, but also does not cause damage to the glass substrate due to excessive pressure, thereby improving the adaptability and versatility of the equipment to the production needs of different products.

[0041] It should be noted that: a support plate 31 is also provided on the bottom surface of the mold base 32 , and the support plate 31 is installed on the top surface of the bottom plate 1 , and the adjustment screw 323 can be easily rotated by the support plate 31 .

[0042] See also Figure 1 and Figure 4 , further comprising a bottom plate 1, a support assembly 4 for supporting a movable mold 5 above a fixed mold 3 is provided on the top of the bottom plate 1, and the support assembly 4 comprises; A plurality of vertical rods 41 are distributed around the mold base 32 in a rectangular array, with the head ends connected to the top surface of the bottom plate 1, and the tail ends extending vertically upward from the top surface of the bottom plate 1 and connected to the top plate 42; The hydraulic cylinder 43 is connected to the bottom surface of the top plate 42 , and a lifting plate 44 is connected to the telescopic end thereof; the lifting plate 44 is slidably connected to the vertical rod 41 , and the movable mold 5 is installed on the bottom surface of the lifting plate 44 .

[0043] Specifically, a plurality of vertical rods 41 support the top plate 42 above the bottom plate 1, a hydraulic cylinder 43 is installed on the bottom surface of the top plate 42, and its telescopic end is connected to the lifting plate 44, and the movable mold 5 is installed on the bottom surface of the lifting plate 44. The opening and closing movements of the movable mold 5 relative to the fixed mold 3 can be controlled by the telescopic movement of the hydraulic cylinder 43 to realize the hot bending forming operation of the glass substrate; a stable and reliable power source for opening and closing the mold is provided, and the movement position and speed of the movable mold 5 can be accurately controlled to ensure the clamping accuracy and the stability of the opening and closing process, which is beneficial to improving the quality and production efficiency of the hot bending forming of the glass substrate, and also lays the foundation for the automatic operation of the entire equipment.

[0044] See also Figure 4 , Figure 5 and Figure 8 , and also includes an air supply component 6 for filling the air cavity 34 with air flow, the air supply component 6 includes, The sleeve 61 is vertically fixed on the top surface of the bottom plate 1 and is located at the rear side of the die holder 32. A piston plate 62 is provided inside the sleeve so as to be able to slide in a sealed manner along its axial direction. The piston rod 63 has one end connected to the top surface of the piston plate 62 and the other end extending upward through the side wall of the sleeve 61 and fixedly connected to the bottom surface of the lifting plate 44; An air inlet pipe 64, one end of which is connected to a side wall of the sleeve 61 and communicates with the sleeve 61, an air inlet check valve 65 is installed inside the pipe, and the other end of the pipe is communicated with the outside; The air outlet pipe 66 has one end connected to the other side wall of the sleeve 61 and communicated with the sleeve 61 , and an air outlet one-way valve 67 is installed inside the air outlet pipe 66 , and the other end extends to the inside of the air cavity 34 and is fixed on the adjustment plate 37 .

[0045] Specifically, during the lifting and lowering process of the movable mold 5, the piston rod 63 moves synchronously with the lifting plate 44, driving the piston plate 62 to slide in the sleeve 61. When the piston plate 62 moves upward, the air pressure in the sleeve 61 decreases, and the external gas enters the sleeve 61 through the air inlet pipe 64; when the piston plate 62 moves downward, the air pressure in the sleeve 61 increases, and the gas enters the air cavity 34 through the air outlet pipe 66, providing an air source for blowing and demolding. The air inlet check valve 65 and the air outlet check valve 67 ensure the unidirectional flow of gas; the lifting and lowering movement of the movable mold 5 is cleverly used to drive the air supply component 6 to work, realizing the effective use of energy, without the need for additional air source power equipment, reducing the energy consumption and cost of the equipment, and at the same time, the linkage between the air supply component 6 and the mold opening and closing action ensures that the blowing operation is carried out at the right time, improving the overall coordination and automation of the equipment.

[0046] See also Figure 1-Figure 3 , and also includes a heating component 2 for heating the glass substrate. The heating component 2 includes a heating cover 22 symmetrically slidably arranged on the bottom plate 1. The inner top wall of the heating cover 22 is provided with an electric heating element. When the two heating covers 22 are relative to each other, they are covered on the outside of the mold base 32.

[0047] Specifically, the two heating covers 22 are symmetrically slidably arranged on the bottom plate 1. When the glass substrate needs to be heated, the two heating covers 22 are brought into contact with each other so that the covers are arranged outside the mold base 32. The glass substrate is heated by the electric heating element on the top wall of the heating cover 22 to achieve hot bending of the glass substrate. The movable heating cover 22 design facilitates the loading and unloading operation of the glass substrate and improves the operating convenience of the equipment. At the same time, it can provide a uniform and stable heating environment during the hot bending process, which is beneficial to improving the quality and consistency of the hot bending of the glass substrate and meeting the production requirements of high-quality curved glass.

[0048] It should be noted that: a slide groove 23 is symmetrically provided on the bottom plate 1, a bidirectional screw rod 25 is rotatably installed inside the slide groove 23, a slide seat 24 is threadedly connected to the bidirectional screw rod 25, a support rod 21 is connected to the top surface of the slide seat 24, the heating cover 22 is movably connected to the support rod 21, a drive motor 26 is also installed on the top surface of the bottom plate 1, a synchronous wheel 27 is installed on the driving end of the drive motor 26 and the bidirectional screw rod 25, and a synchronous belt 28 is connected between the multiple synchronous wheels 27.

[0049] The above technical effect is: the synchronous wheel 27 is driven to rotate by the driving motor 26, and the synchronous wheel 27 drives the bidirectional screw 25 to rotate through the synchronous belt 28, and the bidirectional screw 25 drives the slide 24 threadedly connected to it to slide inside the slide groove 23, and the slide groove 23 drives the support rod 21 and the heating cover 22 to move synchronously, so as to achieve the effect of synchronous relative movement of the two heating covers 22, making the matching of the heating covers 22 more convenient and improving the overall automation level of the equipment.

[0050] On the basis of the above scheme, a guide rod 210 is also slidably mounted on the support rod 21, the end of the guide rod 210 is fixed to the rear side wall of the heating hood 22, a return spring 211 is sleeved on the outside of the guide rod 210, and an avoidance groove 29 whose curvature matches the curvature of the movable mold 5 is opened on the top surface of the heating hood 22.

[0051] The above technical effect is: during the film closing process, the movable mold 5 will squeeze the avoidance groove 29. With the cooperation of the guide rod 210 and the return spring 211, the two heating covers 22 can be driven away from each other by squeezing the avoidance groove 29 by the movable mold 5 to avoid the heating cover 22 affecting the closing of the movable mold 5 and the fixed mold 3.

[0052] Working principle: 1. Hot bending forming stage Mould closing and positioning: Multiple vertical rods 41 in the support assembly 4 support the top plate 42 above the bottom plate 1. The hydraulic cylinder 43 is connected to the bottom surface of the top plate 42. Its telescopic end is connected to the lifting plate 44. The movable mold 5 is installed on the bottom surface of the lifting plate 44. The hydraulic cylinder 43 is started. The telescopic control of the hydraulic cylinder 43 controls the movable mold 5 to close the mold relative to the fixed mold 3. During the closing process, the movable mold 5 and the fixed mold 3 gradually approach and finally close.

[0053] At this time, a mold cavity 33 with an arc-shaped vertical section is provided on the mold base 32 of the fixed mold 3, and the glass substrate raw material is placed at a suitable position between the movable mold 5 and the fixed mold 3, ready for hot bending.

[0054] Heat treatment: The two heating covers 22 of the heating assembly 2 are symmetrically slidably arranged on the bottom plate 1. The two heating covers 22 are brought into contact with each other so that the covers are arranged outside the mold base 32. The electric heating elements arranged on the top wall of the heating covers 22 start to work to heat the glass substrate located in the mold cavity 33. As the temperature rises, the glass substrate gradually softens and undergoes thermal bending deformation according to the shape of the mold cavity 33 until a predetermined thermal bending forming effect is achieved.

[0055] 2. The mold taking stage Trigger valve plate 36 action: When the mold is closed, the movable mold 5 contacts the fixed mold 3 and squeezes the supporting plate 320 in the trigger assembly. The supporting plate 320 drives the follower rod 319 to move downward, and the follower rod 319 drives the sealing plate 318 to slide downward in the sealing cavity 317. The space of the sealing cavity 317 above the sealing plate 318 becomes larger, the gas pressure decreases, and the gas enters the connecting groove 322 through the valve groove 35.

[0056] The valve plate 36 in the valve slot 35 starts to slide under the negative pressure, and the sliding of the valve plate 36 in the valve slot 35 causes the relative positions of the connecting hole 363 and the blowing hole 38 thereon to change. When the valve plate 36 slides, the pull plate 365 in the negative pressure groove 316 is driven to slide through the connecting rod 364. One end of the negative pressure tube 314 is blocked and the other end is open. A plurality of negative pressure ports 315 distributed along its circumference are provided on the side wall of the negative pressure tube 314 near the blocked end. The blocked end of the negative pressure tube 314 extends from the bottom end of the sliding tube 313 into the sliding tube 313. The sliding of the pull plate 365 changes the air pressure state in the negative pressure tube 314.

[0057] When negative pressure is formed in the negative pressure tube 314 , the adsorption plate 312 located in the blowing hole 38 adsorbs the glass substrate to prevent it from shaking or shifting in the mold.

[0058] When the mold is opened, the valve plate 36 is reset, and the gas in the air cavity 34 is blown out through the blowing holes 38. Since a plurality of blowing holes 38 connected to the air cavity 34 are distributed on the bottom surface of the mold cavity 33, the gas acts evenly on the glass substrate to assist it to separate from the mold cavity 33.

[0059] Through the close cooperation and orderly operation of the above components, the automatic heat treatment equipment can efficiently and accurately complete the hot bending and non-destructive molding operations of the glass substrate, meeting the production needs of high-quality curved glass.

Claims

1. An automatic heat treatment device for a glass substrate, comprising a heat bending mold, the heat bending mold comprising a fixed mold (3) and a movable mold (5) that can be opened and closed, the fixed mold (3) comprising a mold base (32), a mold cavity (33) having an arc-shaped vertical cross section being arranged on the mold base (32), characterized in that: Also includes; An air cavity (34) is provided in the mold base (32); a plurality of blowing holes (38) communicating with the air cavity (34) are distributed on the bottom surface of the mold cavity (33); a valve groove (35) communicating with the blowing holes (38) is provided in the mold base (32); and the bottom of the valve groove (35) extends along the length direction of the mold cavity (33); The valve plate (36) is disposed in the valve groove (35) and can slide along the extension direction of the valve groove (35). The valve plate (36) is provided with communication holes (363) corresponding to the air blowing holes (38) in a one-to-one manner. The valve plate (36) slides airtightly along the inner wall of the valve groove (35) to adjust the opening and closing of the air blowing holes (38).

2. The automatic heat treatment equipment for glass substrates according to claim 1, characterized in that: The valve plate (36) further comprises: An arc plate (361) is slidably disposed inside the valve groove (35), and a communication hole (363) is formed through the arc plate; A sealing strip (362) is connected to both ends of the arc plate (361) and slides inside the valve groove (35) in a sealing manner; The arc plate (361) is composed of three arc-shaped pieces that are bonded to each other, the arc-shaped piece located in the middle is fixed to the middle of one of the sealing strips (362), and the arc-shaped pieces located on both sides are fixedly connected to another sealing strip (362).

3. The automatic heat treatment equipment for glass substrates according to claim 2, characterized in that: The fixed mold (3) also includes: The sliding tube (313) is open at both ends, and the top end thereof is connected to a suction plate (312) having a trumpet-shaped structure. The sliding tube (313) is disposed entirely inside the blowing hole (38) and can slide axially along the blowing hole (38); A negative pressure tube (314) is sealed at one end and open at the other end. A plurality of negative pressure ports (315) distributed along the circumference of the negative pressure tube (314) are provided on a side wall near the sealed end. The sealed end of the negative pressure tube (314) extends from the bottom end of the sliding tube (313) into the sliding tube (313). A negative pressure groove (316) corresponding to the blowing holes (38) is provided on the inner top wall of the valve groove (35). The open end of the negative pressure tube (314) extends into the negative pressure groove (316). A pull plate (365) is airtightly and slidably provided inside the negative pressure groove (316), one side of the pull plate (365) is connected to a connecting rod (364), and one end of the connecting rod (364) away from the pull plate (365) is fixed to the top surface of the arc plate (361).

4. The automatic heat treatment equipment for glass substrates according to claim 3, characterized in that: A receiving groove (39) whose shape matches that of the adsorption plate (312) is arranged at the port at the top end of the blowing hole (38); a reducing groove (310) coaxial with the blowing hole (38) is arranged on the mold base (32); the diameter of the reducing groove (310) is larger than that of the blowing hole (38); a supporting spring (311) is arranged inside the reducing groove (310); one end of the supporting spring (311) is fixed to the inner bottom wall of the reducing groove (310); and the other end of the supporting spring (311) is fixed to the outer wall of the sliding tube (313).

5. The automatic heat treatment equipment for glass substrates according to claim 2, characterized in that: It also includes a trigger assembly disposed on the mold base (32) for triggering the valve plate (36) to slide when the mold is closed. The trigger component comprises: The sealing cavity (317) is vertically opened on the mold base (32) and distributed in a rectangular array at the four corners of the mold base (32); a sealing plate (318) is provided inside the sealing cavity (317) for sealing and sliding; A follower rod (319), one end of which is connected to the center of the top surface of the sealing plate (318), and the other end of which extends vertically upward and is connected to the bearing plate (320); The communication groove (322) is provided in the mold base (32), one end of which is in communication with the interior of the sealing cavity (317), and the end in communication with the sealing cavity (317) is located above the sealing plate (318), and the other end of which is in communication with the valve groove (35).

6. The automatic heat treatment equipment for glass substrates according to claim 5, characterized in that: The outer sleeve of the follower rod (319) is provided with a tension spring (321), the top end of the tension spring (321) is fixedly connected to the inner top wall of the sealing cavity (317), and the bottom end of the tension spring (321) is fixedly connected to the top surface of the sealing plate (318).

7. The automatic heat treatment equipment for glass substrates according to claim 1, characterized in that: An adjustment plate (37) is airtightly slidably mounted inside the air cavity (34); an adjustment screw (323) is rotatably connected to the center of the bottom surface of the adjustment plate (37); the adjustment screw (323) is threadedly connected to the mold base (32); the bottom end of the adjustment screw (323) extends below the mold base (32) and is connected to a knob.

8. The automatic heat treatment equipment for glass substrates according to claim 7, characterized in that: It also comprises a bottom plate (1), the top of which is provided with a support assembly (4) for supporting the movable mold (5) above the fixed mold (3), the support assembly (4) comprising: A plurality of vertical rods (41) are distributed in a rectangular array around the mold base (32), with the head ends of the vertical rods connected to the top surface of the bottom plate (1) and the tail ends of the vertical rods extending vertically upward from the top surface of the bottom plate (1) and connected to the top plate (42); The hydraulic cylinder (43) is connected to the bottom surface of the top plate (42), and the telescopic end thereof is connected to a lifting plate (44); the lifting plate (44) is slidably connected to the vertical rod (41), and the movable mold (5) is installed on the bottom surface of the lifting plate (44).

9. The automatic heat treatment equipment for glass substrates according to claim 8, characterized in that: It also includes an air supply component (6) for filling the air cavity (34) with air flow, and the air supply component (6) includes: The sleeve (61) is vertically fixed on the top surface of the bottom plate (1) and is located at the rear side of the mold base (32), and a piston plate (62) is provided inside the sleeve so as to be able to slide in a sealing manner along its axial direction; A piston rod (63), one end of which is connected to the top surface of the piston plate (62), and the other end of which passes through the side wall of the sleeve (61) and then extends upward and is fixedly connected to the bottom surface of the lifting plate (44); An air inlet pipe (64), one end of which is connected to a side wall of the sleeve (61) and communicates with the sleeve (61), an air inlet check valve (65) is installed inside the air inlet pipe (64), and the other end of the air inlet pipe is communicated with the outside; The air outlet pipe (66) has one end connected to the other side wall of the sleeve (61) and communicated with the sleeve (61), an air outlet check valve (67) is installed inside the air outlet pipe, and the other end extends to the inside of the air cavity (34) and is fixed on the adjustment plate (37).

10. The automatic heat treatment equipment for glass substrates according to claim 8, characterized in that: It also comprises a heating assembly (2) for heating the glass substrate, the heating assembly (2) comprising a heating cover (22) symmetrically slidably arranged on the bottom plate (1), the inner top wall of the heating cover (22) being provided with an electric heating element, and the two heating covers (22) being arranged outside the mold base (32) when they are opposite to each other.

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