Tempered vacuum glass production line and processing technology

Abstract

The application provides a toughened vacuum glass production line and processing technology, which comprises a toughening system; the toughening system comprises a heating chamber and a cooling chamber connected with the heating chamber; at least one group of hydraulic cylinders are arranged on the top end face and the bottom end face of the cooling chamber, the extension end of the hydraulic cylinder extends into the cooling chamber, and the extension end is connected with a wind collecting box; two groups of the wind collecting boxes are respectively connected with an upper air grid and a lower air grid; the outlet end of the upper air grid and the lower air grid is connected with a nozzle. The application is provided with multiple groups of nozzles which can be independently controlled, and a sensor is arranged on the shell of each group of nozzles, the real-time temperature in the cooling chamber is sensed through the sensor, and then the temperature in the cooling chamber can be accurately controlled, and the problem of uneven cooling caused by the temperature difference of the points is eliminated to the maximum.

Description

Technical Field

[0001] This invention belongs to the field of glass production technology, and specifically relates to a tempered vacuum glass production line and processing technology. Background Technology

[0002] Tempered vacuum glass is made by sealing two panes of tempered glass together, creating a vacuum between them, and sealing the vent. Tempered vacuum glass offers excellent thermal insulation and soundproofing; its thermal insulation performance is 2-4 times that of insulated glass and 6-10 times that of single-pane glass. To ensure a good fit between the two panes and form a uniform vacuum layer, the surface of the tempered glass must be flat. An uneven surface will result in uneven vacuum layer thickness, affecting the thermal insulation of the vacuum tempered glass. The glass is heated in a tempering furnace through conduction, radiation, and convection.

[0003] After the glass is heated to its softening point, it is quickly transferred to the air-cooling section for cooling. This generates sufficient compressive stress on the surface of the glass. Since the glass is still at its softening point when it first enters the air-cooling section, the two short sides along the direction of exiting the tempering furnace (where the heating chamber and the cooling chamber meet) are more prone to heat absorption when the glass enters the cooling chamber due to the high temperature inside the heating chamber. This results in a warping deformation of about 150mm due to the temperature difference.

[0004] Furthermore, because the air pressure of traditional cooling upper and lower air grilles cannot be controlled, when there is a certain temperature difference between the bottom and upper furnace temperatures, bow-shaped deformation will occur, such as... Figure 10 As shown, the wave-like or bow-shaped deformation of the glass will seriously affect the flatness of the tempered glass appearance.

[0005] Therefore, how to solve the defects in the above-mentioned technical solutions has become one of the urgent problems to be solved in the field of glass production technology. Summary of the Invention

[0006] In view of the problems existing in the background art, the present invention provides a tempered vacuum glass production line, comprising a cutting system, an edge grinding system, an immersion system, a loading system, an unloading system, a drilling system, a dotting system, a tempering system, a powder application system, a lamination system, an edge sealing system, and a sealing system connected in sequence; the tempering system includes a heating chamber and a cooling chamber connected to the heating chamber; a heating device connected to the heating chamber is provided on the heating chamber;

[0007] The tempering system also includes a conveying system for conveying glass to the heating chamber and the cooling chamber; at least one set of hydraulic cylinders are provided on the top end face and the bottom end face of the cooling chamber, and the protruding end of the hydraulic cylinder extends into the cooling chamber and is connected to the air collection box, and the two sets of air collection boxes are respectively connected to the upper air grid and the lower air grid; the outlet ends of the upper air grid and the lower air grid are connected to the nozzle.

[0008] Optionally, the nozzle includes a housing and a control unit disposed within the housing, and the control unit controls the displacement of the movable end within the housing. The movable end is provided with an armature and a release spring integrally disposed therewith.

[0009] Optionally, the housing further includes a guide air duct, and the guide air duct is provided with at least an expansion end and a contraction end arranged in an alternating manner, and the expansion end and the contraction end are connected to each other;

[0010] The movable end, which is away from the release spring, extends into the expansion end, and the end face of the actuator, which is integrally formed with the movable end and located within the expansion end, is provided with a composite sealing structure.

[0011] Optionally, the composite sealing structure includes a sealing ball, and a first sealing element integrally formed therewith is disposed on the end face of the sealing ball away from the moving end.

[0012] The sealing ball is generally elliptical in shape. One end of the sealing ball has a protrusion that extends into the inner wall of the expansion end. The other end of the sealing ball has a second sealing element integrally formed therewith. The second sealing element has a first sealing element integrally formed therewith.

[0013] Furthermore, when the contracted end is in a sealed state, a locking element integrated with it is provided on the end face of the first sealing element away from the sealing ball.

[0014] Optionally, the two end walls of the card are provided with protruding triangular protrusions. When the composite sealing structure is in working state, the pushing card extends into the card groove of the inner wall of the telescopic end for engagement, and the protrusions of the card are located on both sides of the inner wall of the card groove.

[0015] Optionally, a sensor is provided on the housing, and a high-pressure connecting pipe connected to the air duct is provided on the housing. The high-pressure connecting pipe is connected to the expansion end and the storage cavity respectively, and the air outlet of the storage cavity is provided with at least one set of first air outlets.

[0016] Optionally, a barrier plate for easy opening and closing is provided on the support near the contracted end of the sealing ball.

[0017] A second air outlet is provided at the constricted end away from the sealing ball and is connected thereto; the inlet of the second air outlet is elliptical and 15-20mm wide, the outlet is circular and narrows to 8-12mm, and its cross-section is parabolic.

[0018] The second air outlet is provided with at least one set of first ends, and the first ends are embedded in the second air outlet at an inclination angle of 15°-25°, and the cross-section of the first ends is arc-shaped.

[0019] Furthermore, the second air outlet also includes a second end, and the first end and the second end intersect to form a jet hole; and the depth L1 of the jet hole is 80-550um.

[0020] Optionally, a tempered vacuum glass processing technology is characterized by comprising the following steps:

[0021] Step S1: Cut and pre-process the upper and lower glass sheets;

[0022] Step S2, edge grinding;

[0023] Step S3, Immersion: Immerse the glass sheet to form glass with a protective layer on the surface to improve its surface flatness;

[0024] Step S4: Drill holes in the upper glass sheet;

[0025] Step S5: Mark the dots on the lower glass sheet;

[0026] Step S6: Temper the upper and lower glass panes respectively;

[0027] Step S7: Apply powder to the tempered lower glass sheet;

[0028] Step S8, Joining: Use a joining machine to join the upper and lower glass sheets together;

[0029] Step S9, edge sealing: The upper and lower glass sheets are edge sealed using an edge sealing machine after lamination.

[0030] Step S10, sealing: After the edge sealing is completed, the tempered glass with the edge sealed is vacuumed within 12 hours and kept at 200°C in a vacuum furnace for 60 minutes to seal the upper and lower glass pieces after lamination.

[0031] Step S11, detection.

[0032] Optionally, step S3 may also include:

[0033] Step S3.1: Use liquid water for ultrasonic cleaning for 3 minutes, and use 0.3% fluorocarbon surfactant to remove surface grease and stains;

[0034] Step S3.2: Spray 5% nano alumina suspension, with a particle size of less than 50nm, to form a uniform film on the glass surface, filling in micro-cracks or pits on the surface of the original glass sheet that are difficult to observe with the naked eye, and then dry with hot air at 80℃ for 10 minutes to reduce stress concentration during high-temperature tempering.

[0035] Step S3.3: The soaking solution is delivered to the soaking system, and the glass sheet is soaked through the soaking system;

[0036] The soaking solution includes a mixed solution containing 8% silicate, 1% sodium citrate and 91% pure water;

[0037] The glass substrate is immersed in an immersion solution at 35°-65° for 90 seconds to form a protective layer with a thickness of ≤100nm.

[0038] Step S3.4: Dry the glass sheet to form the protective layer and use a segmented heating method for hot air treatment to remove tiny bubbles that may be generated when the soaking solution evaporates.

[0039] Optionally, step S6 may also include:

[0040] Step S6.1, Laying out the sheets: When laying out the sheets for the first batch, it is necessary to control the amount to 1 / 3-2 / 3 of the batch. A uniform, cross-progressive laying out method should be adopted, and the sheets should be placed horizontally on the roller conveyor of the conveyor system.

[0041] Step S6.2: The material is conveyed to the heating chamber of the tempering furnace via a conveying system for heating.

[0042] Step S6.3: After heating is complete, transfer the product to the cooling chamber for cooling.

[0043] Step S6.3.1: 6 minutes before entering the cooling chamber, first adjust the distance of the air collection box according to the thickness of the original glass. Start the hydraulic cylinder and move the air collection box toward the glass through the extended end of the hydraulic cylinder. After moving to the pre-set position, turn off the hydraulic cylinder.

[0044] Step S6.3.2: 3 minutes before the glass enters the cooling chamber, adjust the high-pressure air pressure of the nozzle near the junction of the heating chamber and the cooling chamber to form a high-speed airflow curtain;

[0045] Specifically, when the control unit is powered off, the spring releases and moves the movable end back to its original position, which in turn moves the sealing ball upward. The upward movement of the sealing ball causes the first seal to move away from the retracted end. At this time, high-pressure air is directly delivered to the first and second air outlets through the high-pressure connecting pipe. The maximum high-pressure air is then blown out evenly, forming a high-speed airflow curtain perpendicular to the glass surface. This high-speed airflow curtain prevents the high-temperature air discharged from the heating chamber from flowing back.

[0046] Step S6.3.3: When the glass enters the cooling chamber through the high-speed airflow curtain, the temperature at this location is sensed by the sensor and transmitted to the control system. The control system then determines the required air pressure type at this location.

[0047] If it is necessary to increase the pressure of the high-wind pressure, repeat step S6.3.2.

[0048] If it is necessary to reduce the pressure of the high-wind pressure, proceed to the next step, step S6.3.4;

[0049] Step S6.3.4: The control unit is powered on, which powers the armature. The armature drives the moving end to move downward, and the moving end drives the actuating end to extend into the expansion end, thereby driving the composite sealing structure to complete the sealing.

[0050] At this time, the high-pressure air is ejected through the first air outlet of the storage chamber, thereby reducing the pressure of the high-pressure air.

[0051] Step S6.4: After cooling is complete, the tempering process of the glass is finished.

[0052] In summary, the beneficial effects of this invention are:

[0053] (1) The present invention sets up multiple sets of independently controllable nozzles, and each set of nozzles is equipped with an independently set sensor on its housing. The sensor senses the real-time temperature in the cooling chamber, thereby enabling precise control of the temperature of each part in the cooling chamber and minimizing the problem of uneven cooling caused by temperature differences at individual points.

[0054] (2) The present invention pre-sets the temperature at two short side positions before and after the outlet direction of the tempering furnace (at the junction of the heating chamber and the cooling chamber). When the sensor senses that the temperature at this position reaches the pre-set value, the control unit is powered off, the spring is released and the moving end is driven back to its original position, thereby driving the sealing ball to move upward. The upward movement of the sealing ball causes the first sealing element to leave the contraction end. At this time, the high-pressure air is directly delivered to the first air outlet and the second air outlet through the high-pressure connecting pipe. At this time, the maximum high-pressure air is blown out evenly, forming a high-speed airflow curtain perpendicular to the glass surface. The high-speed airflow curtain blocks the backflow of the high-temperature air discharged from the heating chamber, avoiding warping deformation caused by excessive temperature difference.

[0055] (3) In practical application, the high-pressure air passes through the expansion end and the contraction end in sequence, and enters the second air outlet through the contraction end. Since the first end is embedded in the second air outlet at a 17° inclination angle, it can effectively reduce local resistance. When the high-pressure air enters the second air outlet, part of the airflow (about 30%) is accelerated and ejected through the jet hole to form micro-jet in the same direction as the mainstream. These jets generate longitudinal vortices in the boundary layer, cutting the large-scale turbulence into micro-vortices, reducing the resistance by 27%. At the same time, the negative pressure zone at the jet outlet can offset the pressure difference resistance of the tail vortex, thereby effectively reducing the pressure loss and improving the flow efficiency. At the same time, it makes the high-pressure airflow flow more stable, avoiding violent airflow fluctuations and turbulence, and thus greatly reducing the probability of glass waveform deformation or bow-shaped deformation. Attached Figure Description

[0056] Figure 1 This is a flowchart of an embodiment of a tempered vacuum glass production line and processing technology according to the present invention;

[0057] Figure 2 This is a partial flowchart of an embodiment of a tempered vacuum glass production line and processing technology according to the present invention;

[0058] Figure 3 For the present invention Figure 2 Partial flowchart;

[0059] Figure 4 For the present invention Figure 2 Another part of the flowchart;

[0060] Figure 5 This is a perspective view of a tempering furnace according to an embodiment of a tempered vacuum glass production line and processing technology of the present invention.

[0061] Figure 6 This is a two-dimensional diagram of the air collection box and nozzle assembly according to an embodiment of a tempered vacuum glass production line and processing technology of the present invention;

[0062] Figure 7 For the present invention Figure 6 Enlarged view of the structure at position A in the middle;

[0063] Figure 8 For the present invention Figure 7 Enlarged view of the structure at position B in the middle;

[0064] Figure 9 For the present invention Figure 7 Enlarged view of the central part of the structure;

[0065] Figure 10 This is a diagram showing the flatness deformation of traditional tempered glass.

[0066] Figure label:

[0067] 10. Conveying system; 20. Heating device; 30. Heating chamber; 40. Air collection box; 50. Hydraulic cylinder; 70. Cooling chamber;

[0068] 801. Air duct; 802. Air inlet; 804. Upper air grille; 805. Lower air grille;

[0069] 806. Nozzle; 8061. Moving end; 8062. Release spring; 8063. Housing; 8064. Armature; 8065. Actuating end; 8066. High-pressure connecting pipe; 8067. First air outlet; 8068. Second air outlet; 80681. First end; 80682. Jet hole; 80683. Second end;

[0070] 807. Storage cavity;

[0071] 808. Airflow duct; 8081. First seal; 8082. Sealing ball; 8083. Second seal; 8085. Clip; 8086. Contraction end; 8087. Expansion end; 8088. Barrier plate;

[0072] 809. Sensors. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to facilitate a thorough understanding of the present invention and to fully convey the inventive concept to those skilled in the art.

[0074] In the description of this specification, the references to terms such as "certain embodiments," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] To solve the above technical problems, such as Figure 1-10 As shown, this embodiment provides a tempered vacuum glass production line, characterized in that it includes a cutting system, an edge grinding system, an immersion system, a loading system, a unloading system, a drilling system, a dotting system, a tempering system, a powder application system, a lamination system, an edge sealing system, and a sealing system connected in sequence; the tempering system includes a heating chamber 30 and a cooling chamber 70 connected to the heating chamber 30, and a heating device 20 connected to the heating chamber 30 is provided on the heating chamber 30, the heating device 20 being used to heat the glass;

[0077] It also includes a conveying system 10 for conveying glass to the heating chamber 30 and the cooling chamber 70.

[0078] In practical applications, after the glass is heated to its softening point, it is rapidly transferred to the air-cooling section for cooling. This generates sufficient compressive stress on the glass surface. Since the glass is still at its softening point when it first enters the air-cooling section, along the two short sides before and after the tempering furnace exit direction (where the heating and cooling chambers meet), the high temperature inside the heating chamber causes the glass to absorb heat more easily when entering the cooling chamber. This results in a warping deformation of approximately 150mm due to the temperature difference. Figure 10 As shown, wave-like or bow-shaped deformation of the glass can severely affect the flatness of the tempered glass surface. To solve the above technical problems, please refer to... Figure 1-10 As shown, at least one set of hydraulic cylinders 50 is provided on the top end face and the bottom end face of the cooling chamber 70, and the protruding end of the hydraulic cylinder 50 extends into the cooling chamber 70 and is fixedly connected to the air collection box 40. The two sets of air collection boxes 40 are respectively connected to the upper air grille 804 and the lower air grille 805; the outlet ends of the upper air grille 804 and the lower air grille 805 are connected to the nozzle 806.

[0079] In this embodiment, the glass is guided into the heating chamber 30 by the conveying system 10 for heating. After heating, the glass enters the cooling chamber through the outlet of the heating chamber 30. Then, compressed cold air passes through the air collection box 40 and finally, high-pressure cold air is sprayed onto the glass through the nozzle 806, so that the air flow rate can meet the standard of tempered glass.

[0080] Furthermore, the air collection box 40 is provided with at least one set of air outlets, and the air outlets are connected to the air inlet 802, and the air inlet 802 is connected to the ventilation duct 801, and the nozzle 806 is connected through the ventilation duct 801.

[0081] In this embodiment, the nozzles 806 are distributed along the feeding direction of the conveying system.

[0082] Furthermore, the nozzle 806 includes a housing 8063 and a control unit disposed within the housing 8063. The control unit controls the movable end 8061 to move within the housing 8063. The movable end 8061 is provided with an armature 8064 and a release spring 8062 integrally disposed therewith.

[0083] In this embodiment, by energizing the control unit, the armature pushes the moving end down to keep it in the closed position. When the control unit is de-energized, the spring releases and drives the moving end back to its original position.

[0084] Furthermore, the housing 8063 also includes a guide air duct 808, and the guide air duct 808 is provided with at least an expansion end 8087 and a contraction end 8086 arranged in an alternating manner, and the expansion end 8087 and the contraction end 8086 are connected.

[0085] Furthermore, the movable end 8061, which is away from the release spring 8062, extends into the expansion end 8087, and the end face of the actuating end 8065, which is integrally formed with the movable end, located within the expansion end, is provided with a sealing ball 8082 that is in close contact with it, and the end face of the sealing ball 8082, which is away from the movable end 8081, is provided with a first sealing member 8081 that is integrally formed with it.

[0086] In this embodiment, when the control unit is powered off, the release spring drives the moving end to return to its original position, thereby driving the sealing ball 8082 to move upward. The upward movement of the sealing ball causes the first sealing element 8081 to leave the contraction end 8086.

[0087] Furthermore, the sealing ball 8082 is generally elliptical in shape, one end of the sealing ball 8082 is provided with a protrusion that extends into the inner wall of the expansion end, and the other end of the sealing ball is provided with a second sealing element 8083 integrally formed therewith. The second sealing element 8083 is provided with a first sealing element 8081 integrally formed therewith by means of adhesive or other fixed connection.

[0088] Furthermore, when the retractable end is in a sealed state, a locking member 8085 is provided on the end face of the first sealing member 8081 away from the sealing ball. The locking member 8085 has protruding triangular protrusions on both end walls. When the first sealing member moves down, it pushes the locking member 8085 into the slot of the inner wall of the retractable end for locking connection. When the two are locked, the first sealing member continues to move down and is in close contact with the air inlet of the retractable end. Under the action of the thrust, the protrusions of the locking member are squeezed to both sides of the inner wall, thereby further improving its overall sealing performance.

[0089] In this embodiment, those skilled in the art should understand that the present invention forms a composite sealing structure by combining a first sealing element, a sealing ball, and a locking element. Under the action of thrust, the triangular protrusion is subjected to a certain pressure. At this time, the inclined surface of the protrusion and the locking groove generate a radial component force, forcing the locking element to expand to both sides.

[0090] Simultaneously, when the triangular protrusion of the clamping piece wedges into the inner wall, it converts the axial thrust into the radial expansion force, causing the second sealing piece to press against the inner wall of the expansion end, thus achieving overall sealing. Actual measurements show that the leakage rate of this structure is <0.1mL / min.

[0091] Furthermore, the housing 8063 is provided with a temperature sensor 809, and the housing 8063 is provided with a high-pressure connecting pipe 8066 that communicates with the air duct 801. The high-pressure connecting pipe 8066 is connected to the expansion end 8087 and the storage cavity 807 respectively, and the air outlet of the storage cavity 807 is provided with at least one set of first air outlets 8067.

[0092] Furthermore, a baffle plate 8088 is provided on the support member near the contracted end of the sealing ball. When the baffle plate is subjected to a certain wind pressure, the baffle plate is opened under the action of the wind pressure to facilitate the passage of positive high-pressure air. When the wind pressure of the high-pressure air exceeds the set value, the baffle plate will lose its function to allow more high-pressure air to pass through.

[0093] Furthermore, a second air outlet 8068 is provided at the constricted end away from the sealing ball and is connected thereto; the inlet of the second air outlet 8068 is elliptical and 15-20mm wide, the outlet is circular and narrows to 8-12mm, and its cross-section is parabolic.

[0094] The second air outlet 8068 is provided with at least one set of first end 80681, and the first end 80681 is embedded in the second air outlet 8068 at an inclination angle of 15°-25°, and the cross-section of the first end 80681 is arc-shaped.

[0095] Furthermore, the second air outlet 8068 also includes a second end 80683, and the first end and the second end 80683 intersect to form a jet hole 80682; and the depth L1 of the jet hole 80682 is 80-550um.

[0096] In this embodiment, when the high-pressure air passes through the expansion end and the contraction end in sequence, and enters the second air outlet through the contraction end, when the first end is embedded in the second air outlet at a 17° tilt angle, it can effectively reduce local resistance. After the high-pressure air enters the second air outlet, part of the airflow (about 30%) is accelerated and ejected through the jet hole, forming micro-jet in the same direction as the mainstream. These jets generate longitudinal vortices in the boundary layer, cutting large-scale turbulence into micro-vortices, reducing resistance by 27%. At the same time, the negative pressure zone at the jet outlet can offset the pressure difference resistance of the tail vortex, thereby effectively reducing pressure loss and improving flow efficiency. This makes the high-pressure airflow more stable, avoiding violent airflow fluctuations and turbulence, and thus greatly reducing the probability of glass waveform deformation or bow-shaped deformation.

[0097] Those skilled in the art should understand that by setting multiple sets of independently adjustable nozzles, and each set of nozzles having an independently adjustable sensor on its housing, the real-time temperature inside the cooling chamber can be sensed by the sensor, thereby enabling precise control of the temperature at each point inside the cooling chamber and minimizing the problem of uneven cooling caused by temperature differences at individual points.

[0098] In practical applications, the temperatures at two short-side positions along the tempering furnace outlet direction (where the heating chamber and cooling chamber meet) are preset. When the sensor detects that the temperature at this position has reached the preset value, the control unit is powered off, releasing the spring to drive the moving end back to its original position. This, in turn, causes the sealing ball 8082 to move upward. The upward movement of the sealing ball causes the first sealing element 8081 to move away from the contraction end 8086. At this time, high-pressure air is directly delivered to the first and second air outlets through the high-pressure connecting pipe. The maximum high-pressure air is blown out evenly, forming a high-speed airflow curtain perpendicular to the glass surface. This high-speed airflow curtain blocks the backflow of high-temperature air discharged from the heating chamber 30 (hot air has a lower density and tends to rise), preventing warping and deformation caused by excessive temperature difference.

[0099] A tempered vacuum glass processing technology includes the following steps:

[0100] Step S1: Cut and pre-process the upper and lower glass sheets;

[0101] Step S2, edge grinding;

[0102] Step S3, Immersion: Immerse the glass sheet to form glass with a protective layer on the surface to improve its surface flatness;

[0103] Step S4: Drill holes in the upper glass sheet;

[0104] It should be noted that the first piece needs to be inspected when drilling for the first time, and this is done 4 times per batch during the process;

[0105] Step S5: Mark the dots on the lower glass sheet;

[0106] The following points should be noted: The ambient temperature and humidity for application should be 25±2℃, below 70%; ensure the glue head is clean and the glue material is kept at room temperature; the dot height should be 0.12-0.15mm, the dot diameter 0.8-0.9mm, the distance from the edge should be no less than 15mm, the dot should be perfectly round with a smooth arc at the top and no sharp points;

[0107] Step S6: Temper the upper and lower glass panes respectively;

[0108] Step S7: Apply powder to the tempered lower glass sheet;

[0109] It is important to note that before applying the powder, you need to remove any debris from the coating machine, prepare the powder slurry with a diluent ratio of 8%-10%, and after the powder is thoroughly mixed, roll it in a roller mill for 20-30 minutes. Then, put the well-mixed powder into the powder application tube, seal it, and spin it on a powder slinger for 30-40 minutes. The powder amount should be 18-20g / 20s, 2-3mm away from the glass edge, uniform, and without any powder edges, air bubbles, or obvious powder breaks.

[0110] Step S8, Joining: Use a joining machine to join the upper and lower glass sheets together;

[0111] Step S9, edge sealing: The upper and lower glass sheets are edge sealed using an edge sealing machine after lamination.

[0112] Step S10, sealing: After the edge sealing is completed, the tempered glass with the edge sealed is vacuumed within 12 hours. It is kept at 200℃ in a vacuum furnace for 60 minutes. It should be noted that the vacuum degree must reach 5.0X10-4Pa before sealing.

[0113] Step S11: After activating the getter, place it in a test chamber at a constant temperature for 12 hours. The test chamber temperature is 24 degrees Celsius and the humidity is 50-60%. Measure each piece for 30 minutes, for a total of 10 pieces. Take the 10-minute data of qualified products for large-scale confirmation testing. The heat transfer coefficient error is ±0.1.

[0114] It should be noted that products that pass the test need to have any sebaceous cysts, protective caps, etc. cleaned.

[0115] Those skilled in the art should understand that when sealing the tempered vacuum glass, before it enters the furnace, it is necessary to first use a vacuum cleaner to clean the dust inside the furnace and the dust and debris on the frame; then close the low vacuum valve, high vacuum valve and vent valve; turn on the power switch, start the preheating pump, and after ten minutes, turn on the cooling water switch, and turn on the power switch of the diffusion pump and the vacuum gauge switch to enter the working state.

[0116] Check if the glass is free of powder around its perimeter and if the glass tube is intact. At the same time, wipe the cup area near the glass tube clean. Install the glass onto the frame according to the left and right positions of the vacuum cup and the glass tube. Then, fix the frame and the vacuum unit together with screws and check if they are tightened.

[0117] When the diffusion pump is working normally to 5×10-3 Pa, turn on the pre-pump switch and at the same time check whether the rubber ring on the cup is secure and clean;

[0118] When the pre-vacuum pump reaches 6.0×10-3 Pa, align the vacuum cup with the center of the glass tube and gently unscrew the low vacuum valve to perform pre-vacuum. When the thermocouple gauge shows that the vacuum level has reached 6.0×10-4 Pa, and you are sure that the cup mouth is tightly attached to the glass surface, turn off the low vacuum valve. Repeat this process for each piece of glass to be evacuated.

[0119] After all the glass has been pre-evacuated, push the car frame into the furnace with the furnace door close to the furnace body, then gently open the low vacuum valve to start pre-evacuation. When the thermocouple gauge shows a vacuum of 3×10-4 Pa, turn off the pre-evacuation pump and open the high vacuum valve to exhaust the air.

[0120] Turn on the fan and heating switch to heat the glass (if there is a leak, the high vacuum valve and low vacuum valve must be closed immediately, and the working status of each cup valve must be checked). When the furnace temperature reaches 200℃, keep it at that temperature for 30 minutes, and then turn off the heating switch 3.

[0121] After the heat preservation is completed, slowly open the top cover of the furnace body and start cooling. When the temperature drops to about 70℃ and the vacuum degree reaches 4.0×10-4Pa, the vacuum cart frame can be pulled out for sealing.

[0122] Turn on the sealing power switch, adjust the current, voltage and sealing time (the voltage must not exceed 30V). After adjustment, align the center of the sealing lamp with the glass tube, turn on the switch and start automatic sealing.

[0123] After sealing, check the sealing with a magnifying glass. Repeat this process for each piece of glass. Once you are sure the seal is secure, close all the cup valves and then release the air from the glass opening.

[0124] Turn off the compound vacuum gauge switch, turn off the diffusion pump, and turn off the high vacuum valve. After the diffusion pump has completely cooled down, turn off the back pump, turn off the main power switch, and simultaneously turn off the cooling water switch. Special note:

[0125] During pre-evacuation, close the high vacuum valve first, then open the low vacuum valve.

[0126] When evacuating to a high vacuum, close the low vacuum valve first, then open the high vacuum valve.

[0127] Step S1 further includes:

[0128] Step S1.1: Select finished glass as raw material to ensure the flatness and purity of the glass surface;

[0129] Step S1.2: Adjust the height and pressure of the suction cup according to the glass specifications, and use the suction cup to pick up the glass onto the cutting machine table. Then, use the cutting machine to cut the glass (the table must be cleaned with high-pressure air before cutting each piece of glass).

[0130] Step S1.3: After cutting, tear the upper and lower glass sheets apart along the cutting line, ensuring that there are no beveled edges on the glass.

[0131] Step S2 further includes:

[0132] Step S2.1: Before polishing, test the water quality. Pure water ≤20us, pH value 6-9; use pure water for cleaning to avoid glass powder and glass residue residue that could scratch the glass.

[0133] Step S2.2: Rinse the glass surface with liquid water to wet it;

[0134] Step S2.3: Polish it;

[0135] Step S2.4: After polishing, clean it again (when cleaning, be careful that the staff does not touch the film surface).

[0136] In this embodiment, those skilled in the art should understand that glass should not remain inside the cleaning machine during washing. When cleaning glass longer than 3m, manual control must be used.

[0137] Step S3 further includes:

[0138] Step S3.1: Use liquid water for ultrasonic cleaning for 3 minutes, and use 0.3% fluorocarbon surfactant to remove surface grease and stains;

[0139] Step S3.2: Spray 5% nano alumina suspension (particle size less than 50nm) to form a uniform film on the glass surface, filling in micro-cracks or pits that are difficult to see with the naked eye on the surface of the original glass sheet. Then dry with hot air at 80℃ for 10 minutes to reduce stress concentration during high-temperature tempering.

[0140] Step S3.3: The soaking solution is delivered to the soaking system, and the glass sheet is soaked through the soaking system;

[0141] The soaking solution includes a mixed solution containing 8% silicate, 1% sodium citrate and 91% pure water;

[0142] The glass substrate is immersed in an immersion solution at 35°-65° (preferably 50°) for 90 seconds to form a protective layer with a thickness of ≤100nm.

[0143] Step S3.4: Dry the glass sheet to form the protective layer and use a segmented heating method for hot air treatment to remove tiny bubbles that may be generated when the soaking solution evaporates.

[0144] In this embodiment, those skilled in the art should understand that this application pre-treats the original glass sheet before tempering by adding an immersion process, thereby improving the surface flatness of the tempered glass. The deviation of the bonding gap of the tempered glass after treatment can be controlled within ±0.02mm, significantly improving the uniformity of the vacuum layer. This prevents the occurrence of defects in the heat insulation of vacuum tempered glass due to uneven tempered glass surface, resulting in uneven vacuum layer thickness.

[0145] Step S6 further includes:

[0146] Step S6.1, racking: When racking the first batch of wafers, the amount should be controlled to 1 / 3-2 / 3 of the batch, preferably 1 / 3 of the batch.

[0147] The uniform, cross-progressive arrangement of the sheets is adopted, and they are placed horizontally on the roller conveyor of the conveyor system.

[0148] Step S6.2: The material is conveyed to the heating chamber of the tempering furnace via a conveying system for heating.

[0149] It should be noted that during the addition process, the thermal balance pressure or the frequency of the thermal balance fan needs to be adjusted according to the deformation inside the tempered chamber.

[0150] Step S6.3: After heating is complete, transfer the product to the cooling chamber for cooling.

[0151] Step S6.3.1: 6 minutes before entering the cooling chamber, first adjust the distance of the air collection box according to the thickness of the original glass. Start the hydraulic cylinder 50, and drive the air collection box 40 to move towards the glass through the extended end of the hydraulic cylinder 50. After moving to the pre-set position, close the hydraulic cylinder.

[0152] Step S6.3.2: Before the glass enters the cooling chamber (less than or equal to 3 minutes), adjust the high-pressure air pressure of the nozzle near the junction of the heating chamber and the cooling chamber.

[0153] Specifically: When the control unit is powered off, the spring releases and moves the movable end back to its original position, thereby causing the sealing ball 8082 to move upward. The upward movement of the sealing ball causes the first sealing element 8081 to move away from the contraction end 8086. At this time, high-pressure air is directly delivered to the first and second air outlets through the high-pressure connecting pipe. At this time, the maximum high-pressure air is blown out evenly, forming a high-speed airflow curtain perpendicular to the glass surface. The high-speed airflow curtain prevents the high-temperature air discharged from the heating chamber 30 from flowing back.

[0154] Step S6.3.3: When the glass enters the cooling chamber through the high-speed airflow curtain, the temperature at this location is sensed by the sensor and transmitted to the control system. The control system then determines the required air pressure type at this location.

[0155] If it is necessary to increase the pressure of the high-wind pressure, repeat step S6.3.2.

[0156] If it is necessary to reduce the pressure of the high-wind pressure, proceed to the next step, step S6.3.4;

[0157] Step S6.3.4: The control unit is powered on, which powers the armature. The armature drives the moving end to move down, and the moving end drives the actuating end 8065 to extend into the expanding end 8087, thereby driving the composite sealing structure to complete the sealing.

[0158] At this time, the high-pressure air is ejected through the first air outlet 8067 of the storage chamber, thereby reducing the pressure of the high-pressure air.

[0159] Step S6.4: After cooling is complete, the tempering process of the glass is finished.

[0160] The specific parameter settings for the tempering furnace are shown in Table 1.

[0161] Tempering Furnace Specification Parameter Table

[0162]

[0163]

[0164] The second cooling air pressure is the air pressure near the junction of the heating chamber and the cooling chamber.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A tempered vacuum glass production line, characterized in that, It includes a cutting system, an edge grinding system, a soaking system, a loading system, a unloading system, a punching system, a dotting system, a tempering system, a powder application system, a lamination system, an edge sealing system, and a sealing system connected in sequence; the tempering system includes a heating chamber and a cooling chamber connected to the heating chamber; a heating device connected to the heating chamber is provided on the heating chamber; The tempering system also includes a conveying system for conveying glass to the heating chamber and the cooling chamber; at least one set of hydraulic cylinders is provided on the top end face and the bottom end face of the cooling chamber, and the protruding end of the hydraulic cylinder extends into the cooling chamber and is connected to the air collection box, and the two sets of air collection boxes are respectively connected to the upper air grid and the lower air grid; the outlet ends of the upper air grid and the lower air grid are connected to the nozzle; The nozzle includes a housing and a control unit disposed within the housing. The control unit controls the movement of the movable end within the housing. The movable end is provided with an armature and a release spring integrally disposed therewith. The housing also includes a guide air duct, and the guide air duct is provided with staggered expansion ends and contraction ends, and the expansion ends and contraction ends are connected to each other; The movable end, which is away from the release spring, extends into the expanded end, and the end face of the actuator, which is integrally formed with the movable end and located within the expanded end, is provided with a composite sealing structure; the composite sealing structure includes a sealing ball, and a first sealing element integrally formed with the sealing ball is provided on the end face of the sealing ball, which is away from the movable end. The sealing ball is generally elliptical in shape. One end of the sealing ball has a protrusion that extends into the inner wall of the expansion end. The other end of the sealing ball has a second sealing element that is integrally formed with it.

2. The tempered vacuum glass production line according to claim 1, characterized in that, The second sealing element is provided with a first sealing element integrally formed therewith. When the contracted end is in a sealed state, a retaining element integrally formed therewith is provided on the end face of the first sealing element away from the sealing ball.

3. A tempered vacuum glass production line according to claim 2, characterized in that, The two end walls of the card are provided with protruding triangular protrusions. When the composite sealing structure is in working state, the card is pushed into the slot of the inner wall of the retractable end for locking connection, and the protrusions of the card are located on both sides of the inner wall of the slot.

4. A tempered vacuum glass production line according to claim 3, characterized in that, A sensor is provided on the housing, and a high-pressure connecting pipe is provided on the housing to communicate with the air duct. The high-pressure connecting pipe is connected to the expansion end and the storage cavity respectively, and the air outlet of the storage cavity is provided with at least one set of first air outlets.

5. A tempered vacuum glass production line according to claim 4, characterized in that, A barrier plate for easy opening and closing is provided on the support member near the contracted end of the sealing ball. A second air outlet is provided at the constricted end away from the sealing ball and is connected thereto; the inlet of the second air outlet is elliptical and 15-20mm wide, the outlet is circular and narrows to 8-12mm, and its cross-section is parabolic. The second air outlet is provided with at least one set of first ends, and the first ends are embedded in the second air outlet at an inclination angle of 15°-25°, and the cross-section of the first ends is arc-shaped. Furthermore, the second air outlet also includes a second end, and the first end and the second end intersect to form a jet hole; and the depth L1 of the jet hole is 80-550μm.

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