A glass hot bending manufacturing process
Through a multi-step glass thermal bending process flow, including preheating, thermal bending molding, slow cooling and water cooling, the problem of difficulty in taking into account efficiency and quality in the prior art is solved, and efficient and high-quality glass thermal bending molding is achieved.
Patent Information
- Application Number
- CN202510063492.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-04-08
AI Technical Summary
The existing glass thermal bending technology is difficult to ensure the thermal bending quality while improving efficiency, especially in multi-station equipment, which is difficult to control.
A multi-step process is adopted, including preheating, hot bending, slow cooling and water cooling. The glass mold is processed by a robot under different temperature and pressure conditions to ensure that the glass is heated uniformly and cooled stably throughout the molding process.
It improves the production efficiency of glass hot bending forming, while ensuring high quality of finished products, avoiding the problems of glass fragmentation and large internal stress, and is suitable for small-scale and large-scale production.
Smart Images
Figure CN119774863A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of glass hot bending, in particular to a glass hot bending molding manufacturing process. Background Art
[0002] Glass bending is a method of processing glass. After preheating the glass to a certain temperature, it softens and bends it into the desired shape on a mold or template. There are single-station and multi-station bending equipment. Single-station bending has good quality but low efficiency; multi-station has high efficiency but difficult to control the quality of bending. Under the current high-efficiency and high-quality environment requirements, how to improve efficiency while ensuring the quality of bending; therefore, it is necessary to further innovate the existing bending molding manufacturing process. Summary of the invention
[0003] The purpose of the present invention is to provide a glass hot bending molding manufacturing process with high production efficiency, high precision and good quality in view of the defects and shortcomings of the prior art.
[0004] To achieve the above object, the technical solution adopted by the present invention is: comprising the following steps: a. Place the glass to be bent into the forming mold, and send the forming mold to the preheating station for heating by a robot. The temperature is heated from room temperature to 610°C and the pressure is 0Mpa; b. Send the preheated forming mold to the hot bending machine for hot bending through the manipulator. The hot bending temperature is 650℃-680℃ and the pressure is 0.05-0.3Mpa; c. The formed mold is sent to the slow cooling station by the manipulator for cooling. The temperature of the mold is reduced to 300℃ when it comes out of the hot bending machine, and the pressure is 0-0.1Mpa; d. Use a robot to send the slowly cooled molding mold to a water cooling station to cool it down to below 40°C and the pressure is 0Mpa; finally, discharge and demold the mold to take out the molded glass.
[0005] Furthermore, the preheating station in step a is composed of eight preheating stations, and the residence time of each preheating station is t1. Step a is specifically as follows: The forming mold is sent to the first-level preheating station by a manipulator for preheating from room temperature to 450°C; a gap is provided between the upper preheating plate of the first-level preheating station and the forming mold; The forming mold is sent from the primary preheating station to the secondary preheating station by a robot for preheating, and the temperature is raised to 480°C; The forming mold is sent from the secondary preheating station to the tertiary preheating station by a manipulator for preheating, and the temperature is raised to 500°C; The forming mold is sent from the third-level preheating station to the fourth-level preheating station by a manipulator for preheating, and the temperature is raised to 520°C; The forming mold is sent from the fourth-level preheating station to the fifth-level preheating station by a manipulator for preheating, and the temperature is raised to 550°C; The forming mold is sent from the fifth-level preheating station to the sixth-level preheating station by a manipulator for preheating, and the temperature is raised to 570°C; The forming mold is sent from the sixth-level preheating station to the seventh-level preheating station by a manipulator for preheating, and the temperature is raised to 590°C; The forming mold is sent from the seventh-level preheating station to the eighth-level preheating station by a robot for preheating, and the temperature is raised to 610°C.
[0006] Furthermore, the hot bending forming in step b is performed in three steps, and the residence time of the three forming stations is t1, as follows: b1. The preheated forming mold is sent to the first forming station by a manipulator for the first hot bending forming. The forming temperature of the hot bending machine is 650℃, and the pressure is increased from 0 MPa to 0.05 MPa and then maintained; b2. The forming mold of the first forming station is sent to the second forming station for the second hot bending forming by a manipulator. The forming temperature of the hot bending machine is 680℃, and the pressure is increased from 0 Mpa to 0.3 Mpa and then maintained; b3. The forming mold of the second forming station is sent to the third forming station for the third hot bending forming by a robot. The forming temperature of the hot bending machine is 650℃, and the pressure is increased from 0 MPa to 0.1 MPa and then maintained.
[0007] Furthermore, the slow cooling station described in step c is composed of four slow cooling stations, and the residence time of each slow cooling station is t1. Step c is specifically as follows: The formed mold is sent to the first-level slow cooling station by a robot, the temperature is reduced to 600℃, and the pressure is increased from 0Mpa to 0.1Mpa and then maintained; The forming mold of the first slow cooling station is sent to the second slow cooling station by a manipulator, the temperature is reduced to 550℃, and the pressure is increased from 0 MPa to 0.1 MPa and then maintained; The forming mold of the secondary slow cooling station is sent to the tertiary slow cooling station by a manipulator, the temperature is reduced to 450℃, and the pressure is increased from 0 Mpa to 0.05 Mpa and then maintained; The forming mold of the third-level slow cooling station is sent to the fourth-level slow cooling station by a robot, the temperature is reduced to 300°C, and the pressure is increased from 0 MPa to 0.05 MPa and then maintained.
[0008] Furthermore, the water cooling station in step d is composed of five water cooling stations, and the residence time of each water cooling station is t1. Step d is specifically as follows: the forming mold of the slow cooling station is sent to the first-level water cooling station by a manipulator, and the temperature is reduced to 240°C; the forming mold of the first-level water cooling station is sent to the second-level water cooling station by a manipulator, and the temperature is reduced to 180°C; the forming mold of the second-level water cooling station is sent to the third-level water cooling station by a manipulator, and the temperature is reduced to 120°C; the forming mold of the third-level water cooling station is sent to the fourth-level water cooling station by a manipulator, and the temperature is reduced to 60°C; the forming mold of the fourth-level water cooling station is sent to the fifth-level water cooling station by a manipulator, and the temperature is reduced to below 40°C.
[0009] Furthermore, the t1 is 60-120 seconds.
[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the glass is placed in a molding mold, and the finished product is obtained after sequentially going through a preheating process, a hot bending molding process, a slow cooling process, and a water cooling process. The process of the present invention has high production efficiency and can ensure the quality of hot bending; the temperature difference between the preheating process and the hot bending molding process is small, so that the temperature on the glass is heated and softened uniformly, avoiding glass shattering or large internal stress during molding, thereby ensuring the quality of hot bending. There is cooling under a certain pressure between the hot bending molding process and the slow cooling process, thereby achieving rapid cooling and avoiding uneven deformation of the statue and the risk of explosion of the product. This method is suitable for small-scale production in the experimental or trial production stage, and is also convenient for large-scale batch production. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 Is a flowchart of the present invention; DETAILED DESCRIPTION
[0012] like Figure 1 As shown, the present invention is described in detail below in conjunction with specific embodiments. The following embodiments and descriptions are only used to explain the present invention, but are not intended to limit the present invention.
[0013] A glass hot bending forming manufacturing process according to the present invention comprises the following steps: a. Put the glass to be bent into the forming mold, and send the forming mold to the preheating station for heating by a robot, the temperature is heated from room temperature to 610℃, and the pressure is 0Mpa; b. Send the preheated forming mold to the hot bending machine by a robot for hot bending, the hot bending forming temperature is 650℃-680℃, and the pressure is 0.05-0.3Mpa; c. The formed mold is sent to the slow cooling station by the manipulator for cooling. The temperature of the mold is reduced to 300℃ when it comes out of the hot bending machine, and the pressure is 0-0.1Mpa; d. Use a robot to send the slowly cooled molding mold to a water cooling station to cool it down to below 40°C and the pressure is 0Mpa; finally, discharge and demold the mold to take out the molded glass.
[0014] As an embodiment of the present invention, the preheating station in step a is composed of eight preheating stations, and the residence time of each preheating station is t1. Step a is specifically as follows: The forming mold is sent to the first-level preheating station by a manipulator for preheating from room temperature to 450°C. There is a gap between the upper preheating plate of the first-level preheating station and the forming mold. The preheating plate preheats the forming mold to 450°C through thermal radiation, which allows the forming mold and the glass to heat up slowly to prevent the glass from cracking. The molding die is sent from the first-level preheating station to the second-level preheating station for preheating by a manipulator, and the temperature is raised to 480°C; the molding die is sent from the second-level preheating station to the third-level preheating station for preheating by a manipulator, and the temperature is raised to 500°C; the molding die is sent from the third-level preheating station to the fourth-level preheating station for preheating by a manipulator, and the temperature is raised to 520°C; the molding die is sent from the fourth-level preheating station to the fifth-level preheating station for preheating by a manipulator, and the temperature is raised to 550°C; the molding die is sent from the fifth-level preheating station to the sixth-level preheating station for preheating by a manipulator, and the temperature is raised to 570°C; the molding die is sent from the sixth-level preheating station to the seventh-level preheating station for preheating by a manipulator, and the temperature is raised to 590°C; the molding die is sent from the seventh-level preheating station to the eighth-level preheating station for preheating by a manipulator, and the temperature is raised to 610°C.
[0015] After eight levels of preheating, the temperature is increased gradually from the second level preheating station, allowing the product to heat up slowly so that it can be fully preheated and preheated more evenly. This can avoid glass breakage or high internal stress during molding and ensure the concentricity of the glass. In addition, the preheating time can be shortened.
[0016] As an embodiment of the present invention, the hot bending forming in step b is performed in three steps, and the residence time of the three forming stations is t1, as follows: b1. The preheated forming mold is sent to the first forming station for the first hot bending forming by a robot. The forming temperature of the hot bending machine is 650℃, and the pressure is increased from 0 Mpa to 0.05Mpa and then maintained. b2. The forming mold of the first forming station is sent to the second forming station for the second hot bending forming by a robot. The forming temperature of the hot bending machine is 680℃, and the pressure is increased from 0 Mpa to 0.3Mpa and then maintained. b3. The forming mold of the second forming station is sent to the third forming station for the third hot bending forming by a robot. The forming temperature of the hot bending machine is 650℃, and the pressure is increased from 0 Mpa to 0.1Mpa and then maintained.
[0017] Molding in three steps can improve efficiency. During the molding process, the pressure in the first station is low, the pressure in the second station is high, and the pressure in the third station is medium. This setting greatly reduces the internal stress of the glass, ensures concentricity, ensures the quality of the product, and facilitates subsequent cooling.
[0018] As an implementation mode of the present invention, the slow cooling station described in step c is composed of four slow cooling stations, and the residence time of each slow cooling station is t1. Step c is specifically as follows: The formed mold is sent to the first-level slow cooling station by a manipulator, the temperature is reduced to 600℃, and the pressure is increased from 0Mpa to 0.1Mpa and then maintained; the mold of the first-level slow cooling station is sent to the second-level slow cooling station by a manipulator, the temperature is reduced to 550℃, and the pressure is increased from 0Mpa to 0.1Mpa and then maintained; the mold of the second-level slow cooling station is sent to the third-level slow cooling station by a manipulator, the temperature is reduced to 450℃, and the pressure is increased from 0Mpa to 0.05Mpa and then maintained; the mold of the third-level slow cooling station is sent to the fourth-level slow cooling station by a manipulator, the temperature is reduced to 300℃, and the pressure is increased from 0Mpa to 0.05Mpa and then maintained.
[0019] After molding, the molding mold undergoes four-stage slow cooling. The temperature drop of the first and second stage slow cooling is 50°C under the pressure holding state, and the temperature drop of the third and fourth stage slow cooling is increased under the pressure holding state. This can shorten the cooling time and avoid the risk of uneven deformation and explosion of the product.
[0020] As an embodiment of the present invention, the water cooling station in step d is composed of five water cooling stations, and the residence time of each water cooling station is t1. Step d is specifically as follows: the forming mold of the slow cooling station is sent to the first-level water cooling station by a manipulator, and the temperature is reduced to 240°C; the forming mold of the first-level water cooling station is sent to the second-level water cooling station by a manipulator, and the temperature is reduced to 180°C; the forming mold of the second-level water cooling station is sent to the third-level water cooling station by a manipulator, and the temperature is reduced to 120°C; the forming mold of the third-level water cooling station is sent to the fourth-level water cooling station by a manipulator, and the temperature is reduced to 60°C; the forming mold of the fourth-level water cooling station is sent to the fifth-level water cooling station by a manipulator, and the temperature is reduced to below 40°C.
[0021] Furthermore, the t1 is 60-120 seconds. The t1 of the present invention is preferably 90 seconds; of course, the t1 of the present invention can be 60 seconds or 120 seconds.
[0022] The preheating station and the slow cooling station both include an upper preheating plate and a lower preheating plate. The upper preheating plate is driven downward by the cylinder of the preheating station to press and preheat the forming mold on the lower preheating plate, thereby realizing heat transfer from the preheating station to the forming mold.
[0023] The water cooling station includes an upper cooling plate and a lower cooling plate; circulating coolant or cooling gas is introduced into the upper cooling plate and the lower cooling plate to cool the upper cooling plate and the cylinder of the cooling station drives the upper cooling plate to press down, and the upper cooling plate presses the mold against the lower cooling plate to cool the forming mold. The preheating station, slow cooling station, and water cooling station are essentially the same as the existing technology.
[0024] The difference between the preheating plate and the cooling plate is that the preheating plate is electrically heated; the cooling plate has a flow channel inside. The cooling plate is provided with an inlet and an outlet. The liquid or gas enters the flow channel from the inlet and is discharged from the outlet. The flowing liquid or gas in the flow channel can continuously exchange heat with the molding mold to achieve cooling.
[0025] The molding machine and forming mold used in the present invention are essentially the same as those in the prior art, so they will not be described in detail here.
[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the glass is placed in a molding mold, and the finished product is obtained after sequentially going through a preheating process, a hot bending molding process, a slow cooling process, and a water cooling process. The process of the present invention has high production efficiency and can ensure the quality of hot bending; the temperature difference between the preheating process and the hot bending molding process is small, so that the temperature on the glass is heated and softened uniformly, avoiding glass shattering or large internal stress during molding, thereby ensuring the quality of hot bending. There is cooling under a certain pressure between the hot bending molding process and the slow cooling process, thereby achieving rapid cooling and avoiding uneven deformation of the statue and the risk of explosion of the product. This method is suitable for small-scale production in the experimental or trial production stage, and is also convenient for large-scale batch production.
[0027] The above are preferred embodiments of the present invention, and those skilled in the art can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments, and any obvious improvements, replacements or modifications made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.
Claims
1. A glass hot bending molding manufacturing process, characterized in that: The steps include: (a) Place the glass to be bent into a forming mold, and send the forming mold to a preheating station for heating by a robot, with the temperature heated from room temperature to 610°C and the pressure at 0 MPa; (b) The preheated forming mold is sent to the hot bending machine for forming by a manipulator. The hot bending forming temperature is 650℃-680℃ and the pressure is 0.05-0.3Mpa; (c) The formed mold is sent to the slow cooling station by the manipulator for cooling. The temperature of the mold is reduced to 300°C after it comes out of the hot bending machine, and the pressure is 0-0.1Mpa; (d) The slowly cooled mold is sent to a water cooling station by a robot to be cooled to below 40°C and the pressure is 0 MPa; finally, the mold is removed and the molded glass is taken out.
2. A glass hot bending molding manufacturing process according to claim 1, characterized in that: The preheating station of step (a) is composed of eight preheating stations, and the residence time of each preheating station is t1. Step (a) is specifically as follows: The forming mold is sent to the first-level preheating station by a manipulator for preheating from room temperature to 450°C; a gap is provided between the upper preheating plate of the first-level preheating station and the forming mold; The forming mold is sent from the primary preheating station to the secondary preheating station by a robot for preheating, and the temperature is raised to 480°C; The forming mold is sent from the secondary preheating station to the tertiary preheating station by a manipulator for preheating, and the temperature is raised to 500°C; The forming mold is sent from the third-level preheating station to the fourth-level preheating station by a manipulator for preheating, and the temperature is raised to 520°C; The forming mold is sent from the fourth-level preheating station to the fifth-level preheating station by a manipulator for preheating, and the temperature is raised to 550°C; The forming mold is sent from the fifth-level preheating station to the sixth-level preheating station by a manipulator for preheating, and the temperature is raised to 570°C; The forming mold is sent from the sixth-level preheating station to the seventh-level preheating station by a manipulator for preheating, and the temperature is raised to 590°C; The forming mold is sent from the seventh-level preheating station to the eighth-level preheating station by a robot for preheating, and the temperature is raised to 610°C.
3. A glass hot bending molding manufacturing process according to claim 1, characterized in that: The hot bending forming in step (b) is performed in three steps, and the dwell time of the three forming stations is t1, as follows: (b1), the preheated forming mold is sent to the first forming station by a manipulator for the first hot bending forming. The forming temperature of the hot bending machine is 650°C, and the pressure is increased from 0 MPa to 0.05 MPa and then maintained; (b2) The forming mold of the first forming station is sent to the second forming station for the second hot bending forming by a manipulator. The forming temperature of the hot bending machine is 680°C, and the pressure is increased from 0 MPa to 0.3 MPa and then maintained; (b3) The forming mold of the second forming station is sent to the third forming station for the third hot bending forming by a robot. The forming temperature of the hot bending machine is 650°C, and the pressure is increased from 0 MPa to 0.1 MPa and then maintained.
4. A glass hot bending molding manufacturing process according to claim 1, characterized in that: The slow cooling station described in step (c) is composed of four slow cooling stations, and the residence time of each slow cooling station is t1. The specific steps of step (c) are as follows: The formed mold is sent to the first-level slow cooling station by a robot, the temperature is reduced to 600℃, and the pressure is increased from 0 Mpa to 0.1 Mpa and then maintained; The forming mold of the first slow cooling station is sent to the second slow cooling station by a manipulator, the temperature is reduced to 550℃, and the pressure is increased from 0Mpa to 0.1Mpa and then maintained; The forming mold of the secondary slow cooling station is sent to the tertiary slow cooling station by a manipulator, the temperature is reduced to 450℃, and the pressure is increased from 0Mpa to 0.05Mpa and then maintained; The forming mold of the third-level slow cooling station is sent to the fourth-level slow cooling station by a robot, the temperature is reduced to 300°C, and the pressure is increased from 0Mpa to 0.05Mpa and then maintained.
5. The glass hot bending manufacturing process according to claim 1, characterized in that: The water cooling station in step (d) is composed of five water cooling stations, and the residence time of each water cooling station is t1. The specific steps of step (d) are as follows: The forming mold in the slow cooling station is sent to the primary water cooling station by a robot, and the temperature is reduced to 240℃; The forming mold of the first-level water cooling station is sent to the second-level water cooling station by a robot, and the temperature is reduced to 180℃; The forming mold of the secondary water cooling station is sent to the tertiary water cooling station by a robot, and the temperature is reduced to 120℃; The forming mold of the third-level water cooling station is sent to the fourth-level water cooling station by a robot, and the temperature is reduced to 60℃; The forming mold of the fourth-level water cooling station is sent to the fifth-level water cooling station by a robot, and the temperature is reduced to below 40°C.
6. A glass hot bending manufacturing process according to any one of claims 1 to 5, characterized in that: The t1 is 60-120 seconds.