WO2019113770A1

WO2019113770A1 - Heat bending processing method for 3d curved glass heat bending machine

Info

Publication number: WO2019113770A1
Application number: PCT/CN2017/115584
Authority: WO
Inventors: 路百超; 曹耀辉
Original assignee: 博硕皓泽自动化设备无锡有限公司
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2019-06-20

Abstract

Disclosed is a heat bending processing method for a 3D curved glass heat bending machine. The heat bending machine comprises a feeding and replacement vacuum chamber (1), a fully sealed furnace cavity (2), a discharging and replacement vacuum chamber (3), and a graphite mold (4), wherein each vacuum chamber (1, 3) has two sealing gates; a protective gas is introduced into the furnace cavity (2) by means of a nitrogen filling port (205) before the start of heat bending, and the positive pressure therein, relative to external air, is maintained; and before the graphite mold (4) enters or exits the furnace cavity (2), the replacement of the protective gas with air is completed inside the vacuum chambers (1, 3), thereby preventing external air from entering the mold (4) and the furnace cavity (2). The heat bending machine can greatly reduce the content of oxygen inside the heat bending furnace cavity (2) and a cavity for the mold (4), improve the service life of the mold (4) and key high-temperature components of the heat bending machine, improve product quality and lower manufacturing costs.

Description

Hot bending processing method for 3D curved glass hot bending machine

Technical field

The invention belongs to the technical field of curved glass forming, and particularly relates to a hot bending machine for processing 3D curved glass.

Background technique

At present, most of the domestic 3D curved glass hot bending machines, in the process of curved glass hot bending, because the temperature is as high as 650-850 ° C or even higher, so the graphite material is often used to make the mold; when hot bending, the glass flat sheet is placed In the mold cavity, the mold is then transferred into the hot bending furnace through a transport mechanism for hot bending. In order to reduce the oxidation of the mold and parts caused by the high temperature environment, it is necessary to fill the hot bending furnace with nitrogen having a purity of 99.99% or more as a shielding gas.

technical problem

Even if nitrogen is used as a shielding gas in the hot bending furnace, the air in the cavity of the mold and the air leaking into the cavity when opening and closing the furnace door cannot be completely eliminated, resulting in an increase in the oxygen content in the furnace cavity and accelerating. The oxidation process of molds and high-temperature components at high temperatures reduces the service life of molds and high-temperature components, affects product quality, and reduces the yield and yield of single-set molds; due to the price of graphite molds and high-temperature parts Expensive, causing an increase in production costs and waste of materials.

Technical solution

A hot bending method for a 3D curved glass hot bending machine includes the following processes:

Before the start of the hot bend, it must be ensured that the protective gas has been passed through the nitrogen filling inlet and maintained at a positive pressure relative to the outside atmosphere, the nitrogen outlet valve is opened, the displacement is adjusted as needed; and the upper and lower vacuum chambers and furnaces are guaranteed. The chamber-connected loading seal gate and the blank sealing gate are completely closed and sealed well;

Before entering the loading replacement vacuum chamber, the graphite mold should first close the feeding sealing gate 1, open the feeding vacuum chamber door, and place the graphite mold on the feeding mold tray by a transmission mechanism or a manual method, the feeding vacuum The chamber door is closed, and the mold is enclosed in the vacuum chamber; the vacuum chamber is vacuumed through the vacuum suction hole to remove the vacuum chamber and the air inside the graphite mold, and then the protective gas is introduced through the nitrogen filling inlet; After the sealing gate is pressed, the graphite mold is pushed into the heating furnace cavity by the mold pushing device, the feeding sealing gate is closed, and the loading replacement displacement vacuum chamber waits for the next cycle feeding;

After entering the hot bending furnace cavity, the mold passes the mold through the mold transfer mechanism through the first preheating station, the second preheating station, the third preheating station, the fourth preheating station, and the first molding worker. The position, the second forming station, the third forming station, the first slow cooling station, the second slow cooling station, the first cooling station, the second cooling station, and the third cooling station complete the heat Bending processing

Before the mold is finished in the furnace cavity for hot bending preparation, the blanking sealing gate and the blanking vacuum chamber door of the blanking replacement vacuum chamber should be closed and sealed well, the vacuum system is opened, and the vacuum chamber is evacuated through the vacuum suction port. After the evacuation is completed, the vacuum chamber is filled with the shielding gas through the nitrogen filling inlet; the blank sealing gate is opened, and the mold is pushed out from the fully sealed furnace chamber into the blanking chamber to replace the vacuum chamber, and then the sealing gate is closed. Opening the blanking vacuum chamber door, moving the graphite mold through the blanking mold tray to the discharging position, and moving the graphite mold from the blanking mold tray to the outside of the vacuum chamber through the mold discharging device; the blanking vacuum chamber door is closed The chamber is evacuated and filled with shielding gas, waiting for the next discharge of the heating chamber.

A hot bending method for the 3D curved glass hot bending machine, wherein the shielding gas is nitrogen having a purity greater than 99.99%.

A hot bending processing method for a 3D curved glass hot bending machine according to claim 1,

The loading vacuum chamber door and the blanking vacuum chamber door of the vacuum replacement chamber are horizontally opened and closed in the vertical direction, or may be vertically opened and closed in the vertical direction.

As a further improvement of the above technical solution:

The body of the fully sealed furnace cavity is composed of a furnace cavity sealing bottom plate, a furnace cavity sealing side wall, a mold conveying mechanism, a nitrogen gas outlet valve, and a sensor interface, and the furnace cavity sealing bottom plate is installed at a bottom of the furnace cavity sealing side wall, A mold conveying mechanism is disposed above the furnace chamber sealing bottom plate, and one end of the furnace chamber sealing side wall is provided with a sensor interface, and a nitrogen outlet valve is disposed below the sensor interface.

The four nitrogen filling ports are equally spaced on the upper surface of the fully sealed furnace cavity.

The loading end of the loading displacement vacuum chamber is coupled to the transfer initial end of the mold transfer mechanism.

The blanking end of the blanking replacement vacuum chamber is connected to the conveying end of the mold conveying mechanism.

Beneficial effect

The hot-bending furnace cavity of the fully sealed structure of the invention is filled with high-purity nitrogen gas, and a vacuum chamber is respectively arranged at the feeding port and the discharging port of the furnace cavity, and each vacuum chamber has two sealing gates, 2 The gates are respectively led to the furnace cavity and the outside, and serve as a passage for the mold to enter the vacuum chamber and the vacuum chamber to enter the furnace chamber. Before the mold enters and exits the furnace chamber, the protective gas and air are replaced in the vacuum chamber to prevent outside air from entering the mold and the furnace chamber; The invention can greatly reduce the oxygen content in the cavity of the hot bending furnace and the cavity of the mold, improve the service life of the key high temperature parts of the mold and the hot bending machine, improve the product quality and reduce the manufacturing cost.

DRAWINGS

1 is a schematic structural view of a vacuum displacement 3D curved glass hot bending machine according to the present invention;

2 is a process flow diagram of a vacuum displacement hot bending machine of the present invention;

Figure 3 is a structural view of a loading replacement vacuum chamber of the present invention;

Figure 4 is a structural view of a blanking replacement vacuum chamber of the present invention;

Figure 5 is a structural view of a fully sealed furnace chamber of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

Please refer to FIG. 1-5, a 3D curved glass hot bending machine, including a loading replacement vacuum chamber 1, a fully sealed furnace chamber 2, a blank replacement vacuum chamber 3, a graphite mold 4, and a blank replacement vacuum chamber 3 installed in the whole On the side of the left end of the sealed furnace chamber 2, the loading replacement vacuum chamber 1 is installed on the side of the right end of the fully sealed furnace chamber 2, and the fully sealed furnace chamber 2 is adjacent to the middle of the same side of the loading replacement vacuum chamber 1 and the blank replacement vacuum chamber 3. Provided with a graphite mold 4;

The loading replacement vacuum chamber 1 includes an upper sealing gate 101, a gate opening and closing mechanism 102, a feeding nitrogen filling inlet 103, a loading vacuum chamber 104, a mold pushing device 105, a feeding die tray 106, a loading vacuum chamber door 107, The vacuum chamber door opening and closing device 108 and the vacuum pumping hole 109 are disposed, wherein the loading nitrogen filling inlet 103 is disposed on the upper surface of the loading vacuum chamber 104, and the upper side of the loading vacuum chamber 104 is provided with the shutter opening and closing mechanism 102. A mold pushing device 105 is fixed to the right side of the loading vacuum chamber 104. The bottom of the loading vacuum chamber 104 is provided with a loading vacuum chamber door 107. Above the loading vacuum chamber door 107, a loading die tray 106 is disposed. The vacuum chamber door opening and closing device 108 is installed at the loading vacuum chamber door 107. The left side wall of the loading vacuum chamber 104 is provided with a loading sealing gate 101, and the side wall in front of the loading vacuum chamber 104 is provided with a vacuum. Vent hole 109;

The upper portion of the fully sealed furnace chamber 2 includes a mold pushing mechanism 204, a nitrogen filling inlet 205, a first preheating station 208, a second preheating station 209, a third preheating station 210, and a fourth preheating station 211. The first molding station 212, the second molding station 213, the third molding station 214, the first slow cooling station 215, the second slow cooling station 216, the first cooling station 217, and the second cooling station 218 a third cooling station 219, wherein the mold pushing mechanism 204 is mounted on one side wall of the fully sealed furnace chamber 2, and the upper surface of the fully sealed furnace chamber 2 is provided with four nitrogen filling ports 205, the first preheating worker Bit 208, second preheating station 209, third preheating station 210, fourth preheating station 211, first forming station 212, second forming station 213, third forming station 214, first The slow cooling station 215, the second slow cooling station 216, the first cooling station 217, the second cooling station 218, and the third cooling station 219 are sequentially installed from the right to the left on the upper surface of the fully sealed cavity 2, And away from the location of the nitrogen charging inlet 205;

The blank replacement vacuum chamber 3 includes a blank sealing gate 301, a gate opening and closing device 302, a blanking nitrogen filling inlet 303, a blanking vacuum chamber 304, a mold discharging device 305, a blanking mold tray 306, a blanking vacuum chamber door 307, The vacuum chamber door opening and closing device 308 and the vacuum suction port 309 are disposed. The gate opening and closing device 302 is disposed above the blanking vacuum chamber 304. The bottom end of the gate opening and closing device 302 is provided with a blank sealing gate 301, and the vacuum is blanked. The bottom of the chamber 304 is provided with a blanking vacuum chamber door 307, and a blanking material tray 306 is disposed above the blanking vacuum chamber door 307, and a blanking vacuum chamber door opening and closing device 308 is disposed below the blanking vacuum chamber door 307. One side of the material vacuum chamber 304 is provided with a mold discharge device 305, and a vacuum suction port 309 is provided at an upper end of the lower material vacuum chamber 304 near the mold discharge device 305.

In this embodiment, the body of the fully sealed cavity 2 is composed of a furnace cavity sealing bottom plate 201, a furnace cavity sealing side wall 202, a mold conveying mechanism 203, a nitrogen gas outlet valve 206, and a sensor interface 207. The furnace cavity sealing bottom plate 201 is installed in the furnace cavity. A mold conveying mechanism 203 is disposed above the furnace chamber sealing bottom plate 201. The furnace chamber sealing side wall 202 is provided with a sensor port 207 at one end thereof, and a nitrogen gas outlet valve 206 is disposed below the sensor port 207.

In the present embodiment, four nitrogen filling ports 205 are equally spaced on the upper surface of the fully sealed furnace chamber 2.

In the present embodiment, the loading end of the loading replacement vacuum chamber 1 is connected to the conveying initial end of the mold conveying mechanism 203.

In the present embodiment, the discharge end of the blank replacement vacuum chamber 3 is connected to the transfer end of the mold transfer mechanism 203.

The working principle of this embodiment is as follows: as shown in FIG. 5, the fully sealed furnace cavity 2 must ensure that the protective gas has been passed through the nitrogen charging inlet 205 and maintains a positive pressure relative to the outside atmosphere before the hot bending starts, and the nitrogen gas is turned on. The outlet valve 206 adjusts the displacement amount as needed; and ensures that the loading sealing gate 101 and the blank sealing gate 301 connected to the upper and lower material vacuum chambers and the furnace chamber are completely closed and sealed well;

Figure 2 shows the process flow of the mold inside the hot bending machine and the moving direction of the mold;

As shown in FIG. 3, before entering the loading replacement vacuum chamber 1, the graphite mold 4 should first close the loading sealing gate 101, open the loading vacuum chamber door 107, and place the graphite mold 4 on the transmission mechanism or manually. On the material mold tray 106, the loading vacuum chamber door 107 is closed, and the mold is closed in the vacuum chamber, and then the loading replacement vacuum chamber 1 is evacuated through the vacuum suction hole 109 to eliminate the vacuum chamber and the graphite mold 4 internal air. Then, the protective gas is introduced through the nitrogen filling inlet 103, and the shielding gas is preferably nitrogen having a purity greater than 99.99%; then the loading sealing gate 101 is opened, and the graphite mold 4 is pushed into the heating chamber through the mold pushing device 105, and then loaded. The sealing gate 101 is closed, and the loading replacement vacuum chamber 1 waits for the next cycle of feeding;

As shown in FIG. 5, after entering the hot bending furnace cavity, the mold passes the mold through the first preheating station 208, the second preheating station 209, and the third preheating station 210 through the mold conveying mechanism 203. The four preheating station 211, the first forming station 212, the second forming station 213, the third forming station 214, the first slow cooling station 215, the second slow cooling station 216, and the first cooling station 217 The second cooling station 218 and the third cooling station 219 each perform a hot bending process.

As shown in FIG. 4, before the mold is finished in the furnace chamber for hot bending preparation, the blank sealing gate 301 and the blanking vacuum chamber door 307 of the blanking replacement vacuum chamber 3 should be closed and sealed well, and the vacuum system is opened. The vacuum pumping port 309 evacuates the vacuum chamber. After the evacuation is completed, the vacuum chamber is filled with the shielding gas through the nitrogen filling port 303. Then, the blank sealing gate 301 is opened, and the mold is moved from the full sealing furnace chamber 2 into the blanking displacement vacuum chamber 3 by the mold pushing mechanism 204, and then the cutting sealing gate 301 is closed; the blanking vacuum chamber door 307 is opened, and the graphite mold is opened. 4 is moved to the discharge position by the blanking mold tray 306, and the graphite mold 4 is moved from the blanking mold tray 306 to the outside of the vacuum chamber by the mold discharge device 305; the blanking vacuum chamber door 307 is closed, and the chamber is pumped Vacuum and charge the protective gas, waiting for the next discharge of the heating chamber;

The loading vacuum chamber door 107 and the blanking vacuum chamber door 307 mentioned in the vacuum displacement chamber embodiment are horizontally opened and closed in the vertical direction, and may be vertically opened and closed in the vertical direction.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

A hot bending processing method for a 3D curved glass hot bending machine, comprising the following process:

Before the start of the hot bend, it must be ensured that the protective gas has been passed through the nitrogen filling inlet (205) and the positive pressure relative to the outside atmosphere has been maintained, the nitrogen outlet valve (206) is opened, and the displacement is adjusted as needed; The loading sealing gate (101) and the blanking sealing gate (301) connected to the blanking chamber and the furnace chamber are completely closed and sealed well;

Before entering the loading replacement vacuum chamber (1), the graphite mold (4) should first close the loading sealing gate 1 (101), open the loading vacuum chamber door (107), and pass the graphite mold through a transmission mechanism or a manual method. 4) placed on the loading mold tray (106), the loading vacuum chamber door (107) is closed, and the mold is enclosed in the vacuum chamber; the loading replacement vacuum chamber (1) is performed through the vacuum suction hole (109). Vacuuming, removing the air inside the vacuum chamber and the graphite mold (4), and then introducing the shielding gas through the filling nitrogen inlet (103); then opening the loading sealing gate (101), and passing the graphite mold through the mold pushing device (105) (4) After pushing into the heating furnace chamber, the loading sealing gate (101) is closed, and the loading replacement vacuum chamber (1) waits for the next cycle to feed;

After entering the hot bending furnace cavity, the mold passes the mold through the first preheating station (208), the second preheating station (209), and the third preheating station (210) through the mold conveying mechanism (203). , a fourth preheating station (211), a first forming station (212), a second forming station (213), a third forming station (214), a first slow cooling station (215), a second The hot work is completed in each working position of the slow cooling station (216), the first cooling station (217), the second cooling station (218), and the third cooling station (219);

Before the mold is finished in the furnace cavity for hot bending preparation, the blanking sealing gate (301) and the blanking vacuum chamber door (307) of the blanking replacement vacuum chamber (3) should be closed and sealed well, and the vacuum system is opened. The vacuum chamber is evacuated by the vacuum suction port (309). After the evacuation is completed, the vacuum chamber is filled with the shielding gas through the nitrogen filling inlet (303); the blank sealing gate (301) is opened, and the mold pushing mechanism (204) is opened. The mold is moved from the fully sealed furnace chamber (2) into the blank replacement vacuum chamber (3), and then the blank sealing gate (301) is closed; the blanking vacuum chamber door (307) is opened, and the graphite mold (4) is passed through the blanking. The mold tray (306) is moved to the discharge position, and the graphite mold (4) is moved from the blank mold tray (306) to the outside of the vacuum chamber by the mold discharge device (305); the blank vacuum chamber door (307) When closed, the chamber is evacuated and filled with shielding gas, waiting for the next discharge of the heating chamber.
The hot bending method for a 3D curved glass hot bending machine according to claim 1, wherein the shielding gas is nitrogen having a purity greater than 99.99%.
The hot bending processing method for a 3D curved glass hot bending machine according to claim 1, wherein:

The loading vacuum chamber door (107) and the blanking vacuum chamber door (307) of the vacuum replacement chamber are horizontally opened and closed in the vertical direction, and may be vertically opened and closed in the vertical direction.
The hot bending method for a 3D curved glass hot bending machine according to claim 1, wherein the body of the fully sealed furnace chamber (2) is sealed by a furnace chamber (201) and a furnace chamber sealing sidewall (202). a mold transport mechanism (203), a nitrogen gas outlet valve (206), and a sensor interface (207), the furnace chamber sealing bottom plate (201) is mounted at the bottom of the furnace chamber sealing side wall (202), the furnace chamber is sealed A mold transfer mechanism (203) is disposed above the bottom plate (201), and one end of the cavity seal sidewall (202) is provided with a sensor interface (207), and a nitrogen outlet valve is disposed below the sensor interface (207) 206).
The hot bending method for a 3D curved glass hot bending machine according to claim 1, characterized in that the four nitrogen filling ports (205) are equally spaced on the upper surface of the fully sealed furnace chamber (2).
The hot bending method for a 3D curved glass hot bending machine according to claim 1, characterized in that the loading end of the loading replacement vacuum chamber (1) is connected to the conveying initial end of the mold conveying mechanism (203).
The hot bending method for a 3D curved glass hot bending machine according to claim 1, wherein a discharge end of the blank replacement vacuum chamber (3) is connected to a conveying end of the mold conveying mechanism (203).