An edge-sealing device for vacuum glass processing and its edge-sealing method

Abstract

The present invention discloses an edge-sealing device for vacuum glass processing and an edge-sealing method thereof. The edge-sealing device includes an edge-sealing heating box, and several layers of plates are arranged inside the edge-sealing heating box. The area between two adjacent layers of plates serves as an edge-sealing channel. A rectangular electric heating plate is fixedly embedded in the rectangular through groove of the layer plate. A workpiece to be edge-sealed is loaded in a material frame. The workpiece to be edge-sealed includes a glass sheet, a sealing frame, and a support member. A rectangular groove is formed on the inner side of the glass sheet, and a rectangular filling tube is clamped in the rectangular groove. The filling tube is filled with low-melting-point glass powder. Both ends of the sealing frame are provided with outwardly protruding ridges, and a rib groove is arranged on the lower side of the filling tube. Both ends of the support member respectively abut against the inner side surfaces of two glass sheets. The present invention uses the filling tube to load the low-melting-point glass powder, which can improve the uniformity of the low-melting-point glass powder. The heating system matches the parts that need to be heated in the workpiece to be edge-sealed, which is conducive to batch continuous edge-sealing and has a high edge-sealing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum glass processing, and particularly relates to an edge-sealing device for vacuum glass processing and an edge-sealing method thereof. Background Art

[0002] The manufacturing of vacuum glass is carried out under normal pressure (i.e., the pressure inside the container is lower than 0.1 mpa and the vacuum degree is lower than 0.02 mpa), or under high vacuum and isobaric conditions, using low-melting-point glass powder to be melted at high temperature for glass edge-sealing. Since the low-melting-point glass powder naturally levels off and contacts the upper and lower glass sheets under isobaric conditions and solidifies to complete the sealing, the leveling property and adhesion of the melted low-melting-point glass powder are not good, resulting in relatively large defects in the edge-sealing quality, and the air leakage rate after edge-sealing is not lower than 15%.

[0003] The patent specification with the publication number CN103145325B discloses a high-pressure and high-temperature edge-sealing method for vacuum glass. The steps are as follows: (1) Apply a closed circle of low-melting-point glass powder around the edges of the lower glass sheet with supports, and combine the upper glass sheet with the lower glass sheet; (2) Place the combined glass sheets into a high-pressure and high-temperature heating autoclave, and the glass can be placed upright or flat on the bracket; (3) Heat the high-pressure and high-temperature heating autoclave to the melting point of the glass powder, which is 350°C - 480°C, and the air compressor pressurizes the autoclave to 0.1 MPa - 5 MPa, keep the temperature and pressure for 0.2 - 2 hours, and then reduce the pressure and lower the temperature to obtain the finished vacuum glass product. In the above method, low-melting-point glass powder is placed between the edges of the two glass sheets. The temperature is raised to 350°C - 480°C at normal pressure in the autoclave, and then pressurization is carried out after the low-melting-point glass powder melts, so that the two glass sheets are squeezed by vacuum, thereby enabling the melted low-melting-point glass powder to fully and closely contact the upper and lower glass sheets. The heat conduction speed and amount are both increased, the adhesion and leveling property of the powder after melting are enhanced, the sealing quality of the edge-sealing with low-melting-point glass powder is improved, and the technical problem of air leakage after edge-sealing is effectively solved.

[0004] However, during the high-pressure and high-temperature treatment, it is necessary to put it into a high-pressure and high-temperature heating autoclave and first preheat and heat it in the high-temperature and high-pressure heating autoclave before high-pressure extrusion can be carried out, which results in low processing efficiency. How to improve the process of high-temperature pressurized edge-sealing treatment has become a technical problem to be solved. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above problems existing in the traditional technology and provide an edge-sealing device for vacuum glass processing and an edge-sealing method thereof.

[0006] To achieve the above technical purpose and reach the above technical effect, the present invention is realized through the following technical solutions:

[0007] An edge-sealing device for vacuum glass processing. The edge-sealing device includes an edge-sealing heating box. Inside the edge-sealing heating box, there are several layers of plates. The area between two adjacent layers of plates serves as an edge-sealing channel. In the layer of plates, there are formed rectangular-ring-shaped through grooves. In the rectangular-ring-shaped through grooves, rectangular-ring-shaped electric heating plates are embedded and fixed. At both ends of the layer of plates below the edge-sealing channel, there are symmetrically arranged guide plates for facilitating the introduction of a material frame. Inside the material frame, there are workpieces to be edge-sealed. When the material frame is completely displaced into the edge-sealing channel, the material frame and the layer of plates on both sides can form a sealed heating chamber. The workpieces to be edge-sealed include glass sheets, a sealing frame, and support members. There are two glass sheets in total. Inside the glass sheets, there are formed rectangular-ring-shaped grooves. In the rectangular-ring-shaped grooves, rectangular-ring-shaped filling tubes are snap-fitted. In the filling tubes, there is filled low-melting-point glass powder. At both ends of the sealing frame, there are convex edges protruding outward. Below the filling tubes, there are formed rib grooves for cooperating with the convex edges. The support members are located inside the sealing frame, and both ends of the support members are respectively abutted against the inner side surfaces of the two glass sheets.

[0008] Further, in the above-mentioned edge-sealing device for vacuum glass processing, there is a gap of 1 - 3 mm left between the two end faces of the rectangular-ring-shaped electric heating plate and the corresponding opening faces in the rectangular-ring-shaped through groove.

[0009] Further, in the above-mentioned edge-sealing device for vacuum glass processing, the rectangular-ring-shaped electric heating plate is an alumina ceramic electric heating sheet, and the specification of the rectangular-ring-shaped electric heating plate is matched with the specification of the rectangular-ring-shaped groove.

[0010] Further, in the above-mentioned edge-sealing device for vacuum glass processing, the material frame includes a rectangular-ring-shaped frame plate. Inside the rectangular-ring-shaped frame plate, there is a placement area. In the middle of the placement area, there is a rectangular-ring-shaped support net fixed to the rectangular-ring-shaped frame plate.

[0011] Further, in the above-mentioned edge-sealing device for vacuum glass processing, several groups of positioning holes are symmetrically opened at the upper and lower ends of the rectangular-ring-shaped frame plate. At least one group of top ball mechanisms are symmetrically arranged on the upper and lower sides of the edge-sealing channel. The top ball mechanism is composed of a movable groove, a compression spring, and a top ball. One end of the compression spring is fixed to the bottom end of the movable groove, and the other end supports the top ball.

[0012] Further, in the above-mentioned edge-sealing device for vacuum glass processing, the rectangular-ring-shaped frame plate and the rectangular-ring-shaped support net are both made of high-temperature-resistant stainless steel material; the filling tube is a wax tube made of paraffin material.

[0013] Further, in the above-mentioned edge-sealing device for vacuum glass processing, a vacuum suction pipe is embedded and fixed in the sealing frame, and the inner cavity of the sealing frame is in one-way communication with the outside through the vacuum suction pipe.

[0014] Further, in the above-mentioned edge-sealing device for vacuum glass processing, the edge-sealing method of the edge-sealing device includes the following steps:

[0015] 1) Cut glass sheets of required sizes according to the shape and size of the fabricated vacuum glass. Process a zigzag groove on the inner side of the glass sheets. Insert a filling tube filled with low-melting glass powder into the processed zigzag groove. Place one glass sheet flat and insert a sealing frame into the filling tube inside it. Then, evenly place support members inside the sealing frame. Cover the other glass sheet on the sealing frame so that the sealing frame is inserted into the upper filling tube, completing the assembly of the workpiece to be edge-sealed.

[0016] 2) Load the assembled workpiece to be edge-sealed into a material frame. Use a circulating conveying device to sequentially push the material frame into the edge-sealing channel. Heat the zigzag electric heating plate to the temperature of 550 - 750 °C at which the glass softens, heat the low-melting glass powder. The filling tube vaporizes during the heating process, and the molten low-melting glass powder bonds the two glass sheets and the sealing frame together.

[0017] 3) Use the circulating conveying device to sequentially push the material frame out of the edge-sealing channel. After the material frame cools down, take out the workpiece that has been heated and edge-sealed, and use the vacuum suction tube embedded in the sealing frame to evacuate the workpiece to obtain the required vacuum glass.

[0018] The beneficial effects of the present invention are as follows:

[0019] The structure of the present invention is reasonably designed. On the one hand, using the filling tube to load the low-melting glass powder can improve the uniformity of the low-melting glass powder, thereby ensuring the reliability of edge-sealing. On the other hand, the heating system matches the parts that need to be heated in the workpiece to be edge-sealed, which can improve the utilization rate of thermal energy, facilitate batch continuous edge-sealing, and has a relatively high edge-sealing efficiency.

[0020] Of course, it is not necessary for any product implementing the present invention to achieve all the above advantages simultaneously. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of the edge-sealing device in the present invention;

[0023] Figure 2 It is a partial enlarged schematic diagram at A in Figure 1;

[0024] Figure 3 It is a schematic structural diagram of the material frame in the present invention;

[0025] Figure 4It is a schematic structural diagram of the workpiece to be edge-sealed in the present invention;

[0026] Figure 5 It is a schematic cross-sectional structural diagram of the sealing frame in the present invention;

[0027] Figure 6 It is a schematic cross-sectional structural diagram of the filling tube in the present invention;

[0028] In the attached drawings, the reference numerals of each component are as follows:

[0029] 1-edge-sealing heating box, 2-laminate, 3-edge-sealing channel, 4-rectangular ring-shaped through groove, 5-rectangular ring-shaped electric heating plate, 6-guiding plate, 7-material frame, 701-rectangular ring-shaped frame plate, 702-placement area, 703-rectangular ring-shaped support net, 704-positioning hole, 8-workpiece to be edge-sealed, 801-glass sheet, 802-sealing frame, 803-supporting member, 804-filling tube, 805-low melting point glass powder. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-6 As shown, this embodiment is an edge-sealing device for processing vacuum glass. The edge-sealing device includes an edge-sealing heating box 1. Inside the edge-sealing heating box 1, there are several laminates 2. The area between two adjacent laminates 2 serves as an edge-sealing channel 3. A rectangular ring-shaped through groove 4 is opened in the laminate 2, and a rectangular ring-shaped electric heating plate 5 is embedded and fixed in the rectangular ring-shaped through groove 4. At both ends of the laminate 2 below the edge-sealing channel 3, guiding plates 6 for facilitating the introduction of the material frame 7 are symmetrically arranged. The material frame 7 contains the workpiece 8 to be edge-sealed. When the material frame 7 is completely displaced into the edge-sealing channel 3, the material frame 7 and the laminates 2 on both sides can form a sealed heating chamber.

[0032] In this embodiment, the material frame 7 includes a rectangular ring-shaped frame plate 701. Inside the rectangular ring-shaped frame plate 701, there is a placement area 702. In the middle of the placement area 702, there is a rectangular ring-shaped support net 703 fixed to the rectangular ring-shaped frame plate 701. Several groups of positioning holes 704 are symmetrically opened at the upper and lower ends of the rectangular ring-shaped frame plate 701. At least one set of top ball mechanisms (not shown in the figure) are symmetrically arranged on the upper and lower sides of the edge-sealing channel 3. The top ball mechanism consists of a movable groove, a compression spring, and a top ball. One end of the compression spring is fixed to the bottom end of the movable groove, and the other end supports the top ball. The part of the top ball exposed from the movable groove cooperates with the positioning hole 704.

[0033] In this embodiment, the workpiece 8 to be edge-sealed includes a glass sheet 801, a sealing frame 802, and a support member 803. There are two glass sheets 801 in total. A rectangular groove is formed on the inner side of the glass sheet 801, and a rectangular filling tube 804 is clamped in the rectangular groove. Low-melting-point glass powder 805 is filled in the filling tube 804. Convex ribs protruding outward are provided at the upper and lower ends of the sealing frame 802, and a rib groove for cooperating with the convex ribs is provided on the lower side of the filling tube 804. The support member 803 is located inside the sealing frame 802, and both ends of the support member 803 abut against the inner side surfaces of the two glass sheets 801 respectively.

[0034] In this embodiment, a gap of 1-3 mm is left between the two end faces of the rectangular electric heating plate 5 and the corresponding opening faces in the rectangular through groove 4. The rectangular electric heating plate 5 is an alumina ceramic electric heating sheet, and the specifications of the rectangular electric heating plate 5 match the specifications of the rectangular groove.

[0035] In this embodiment, a vacuum suction pipe is fixedly embedded in the sealing frame 802, and the inner cavity of the sealing frame 802 is in one-way communication with the outside through the vacuum suction pipe.

[0036] In this embodiment, the rectangular frame plate 701 and the rectangular support net 703 are both made of high-temperature-resistant stainless steel material. The filling tube 804 is a wax tube made of paraffin material and is easily vaporized when heated.

[0037] This embodiment also provides an edge-sealing method for the above-mentioned edge-sealing device for processing vacuum glass, which specifically includes the following steps:

[0038] 1) Cut glass sheets with required sizes according to the shape and size of the vacuum glass to be manufactured. Process a rectangular groove on the inner side of the glass sheet 801, insert a filling tube 804 filled with low-melting-point glass powder into the processed rectangular groove. Place one glass sheet 801 flat and insert the sealing frame 802 into the filling tube 804 therein. Then evenly place the support member 803 inside the sealing frame 802. The support member 803 is cylindrical or strip-shaped. Cover the other glass sheet 801 on the sealing frame 802 so that the sealing frame 802 is clamped into the upper filling tube 804 to complete the assembly of the workpiece 8 to be edge-sealed.

[0039] 2) Load the assembled workpiece 8 to be edge-sealed into the material frame 7, and use the circulating conveying device to push the material frame 7 into the edge-sealing channel 3 in sequence. Heat the rectangular electric heating plate 5 to the temperature of 550-750 °C at which the glass softens, heat the low-melting-point glass powder 805. The filling tube 804 vaporizes during the heating process, and the molten low-melting-point glass powder 805 bonds the two glass sheets 801 and the sealing frame 802 together. The sealing frame 802 is made of the same glass material as the glass sheet 801.

[0040] 3) Use the loop conveyor equipment to push out the material frames 7 from the edge sealing channel 3 in sequence. After the material frames 7 are cooled down, take out the workpieces with heat-sealed edges, and use the vacuum suction pipes embedded in the sealing frame 802 to evacuate the workpieces to obtain the required vacuum glass.

[0041] A specific application of this embodiment is as follows: The structure design of this embodiment is reasonable. On the one hand, using the filling pipe 804 to load the low-melting-point glass powder 805 can improve the uniformity of the low-melting-point glass powder 805, thereby ensuring the reliability of edge sealing. On the other hand, the heating system matches the parts that need to be heated in the workpiece 8 to be edge-sealed, which can improve the utilization rate of thermal energy, facilitate batch continuous edge sealing, and has a relatively high edge-sealing efficiency.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor limit the invention to only the specific implementation manners. Obviously, many modifications and variations can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An edge-sealing device for vacuum glass processing, the edge-sealing device comprising an edge-sealing heating box, characterized in that: The interior of the edge-sealing heating box is provided with several layers of plates. The area between two adjacent layers of plates serves as an edge-sealing channel. The layer of plates is provided with a rectangular ring-shaped through groove, and a rectangular ring-shaped electric heating plate is fixedly embedded in the rectangular ring-shaped through groove. At both ends of the layer of plates below the edge-sealing channel, there are symmetrically arranged guide plates for facilitating the introduction of the material frame. The material frame is loaded with workpieces to be edge-sealed. When the material frame is completely displaced into the edge-sealing channel, the material frame and the layer of plates on both sides can form a sealed heating chamber. The workpieces to be edge-sealed include glass sheets, a sealing frame, and a support member. There are two glass sheets in total. A rectangular ring-shaped groove is formed on the inner side of the glass sheet, and a rectangular ring-shaped filling tube is clamped in the rectangular ring-shaped groove. The filling tube is filled with low-melting-point glass powder. Both ends of the sealing frame are provided with outwardly protruding ridges, and a ridge groove for cooperating with the ridges is arranged on the lower side of the filling tube. The support member is located inside the sealing frame, and both ends of the support member are respectively abutted against the inner side surfaces of the two glass sheets. A gap of 1-3 mm is left between the two end faces of the rectangular ring-shaped electric heating plate and the corresponding opening faces in the rectangular ring-shaped through groove. The rectangular ring-shaped electric heating plate is an alumina ceramic electric heating sheet, and the specification of the rectangular ring-shaped electric heating plate matches the specification of the rectangular ring-shaped groove. The material frame includes a rectangular ring-shaped frame plate. The interior of the rectangular ring-shaped frame plate is provided with a placement area, and a rectangular ring-shaped support net fixed to the rectangular ring-shaped frame plate is arranged in the middle of the placement area. A plurality of groups of positioning holes are symmetrically arranged at the upper and lower ends of the rectangular ring-shaped frame plate. At least one group of top ball mechanisms are symmetrically arranged on the upper and lower sides of the edge-sealing channel. The top ball mechanism is composed of a movable groove, a compression spring, and a top ball. One end of the compression spring is fixed to the bottom end of the movable groove, and the other end supports the top ball. The rectangular ring-shaped frame plate and the rectangular ring-shaped support net are both made of high-temperature-resistant stainless steel materials. The filling tube is a wax tube made of paraffin material. A vacuum suction port tube is fixedly embedded in the sealing frame, and the inner cavity of the sealing frame is in one-way communication with the outside through the vacuum suction port tube. The edge-sealing method using this edge-sealing device includes the following steps: 1) Cut glass sheets with required sizes according to the shape and size of the vacuum glass to be manufactured. Process a rectangular ring-shaped groove on the inner side of the glass sheet. Clamp a filling tube filled with low-melting-point glass powder in the processed rectangular ring-shaped groove. Place one glass sheet flat and clamp the sealing frame into the filling tube inside it. Then, evenly place the support member inside the sealing frame. Cover the other glass sheet on the sealing frame so that the sealing frame is clamped into the upper filling tube to complete the assembly of the workpieces to be edge-sealed. 2) Load the assembled workpieces to be edge-sealed into the material frame. Use the circulating conveying device to push the material frame into the edge-sealing channel in sequence. Heat the rectangular ring-shaped electric heating plate to the temperature of 550-750 °C at which the glass softens, heat the low-melting-point glass powder. The filling tube vaporizes during the heating process, and the molten low-melting-point glass powder bonds the two glass sheets and the sealing frame together. 3) Use the circulating conveying device to push the material frame out of the edge-sealing channel in sequence. After the material frame cools down, take out the workpiece that has been heated and edge-sealed, and use the vacuum suction port tube embedded in the sealing frame to evacuate the workpiece to obtain the required vacuum glass.

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