Single-side overflow plate glass former and plate glass forming system

Abstract

The invention discloses a single-side overflow plate glass former and a plate glass forming system in the technical field of plate glass production. The single-side overflow plate glass former comprises a seat body, the material receiving hole is formed in one transverse end of the seat body and extends in the vertical direction; the overflow groove is formed in the other transverse end of the seat body and extends in the longitudinal direction; the two overflow flanges are formed at the other transverse end of the base body and located at the two longitudinal ends of the overflow groove. The connecting flow channel is formed in the base body, the connecting flow channel comprises a pipe bending area, a transition area and an expansion area which are sequentially arranged in the transverse direction, the top end of the pipe bending area communicates with the bottom end of the material receiving hole, the transition area is fixedly connected between the pipe bending area and the expansion area, and the top end of the expansion area extends upwards in an inclined mode and communicates with the overflow groove after penetrating through the base body. According to the forming device, the residual stress of the glass plate can be uniformly distributed, the forming quality of the plate glass is improved, and the crystallization phenomenon of molten glass at the bottom of the forming device can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of flat glass production, and in particular to a flat glass former with single-side overflow and a flat glass forming system. Background Art

[0002] In the field of ultra-thin flat glass manufacturing, the main forming processes include overflow down-draw method, slit down-draw method and float method.

[0003] Patent document TWM457895U discloses a double-sided overflow flat glass former, which adopts a double-sided overflow fusion method. When high-temperature glass liquid (in a molten state) flows into the overflow groove, the glass liquid overflows from both sides of the overflow groove and overlaps the overflow molding at the lower tip of the seat. In actual production activities, the double-sided overflow flat glass former still has the following shortcomings:

[0004] 1. The residual stress distribution of the formed glass sheet is uneven, which affects the quality of the flat glass.

[0005] 2. When producing flat glass with low liquid viscosity, crystallization is likely to occur at the tip of the bottom of the overflow tank, which can lead to failure of glass liquid fusion.

[0006] Therefore, how to achieve uniform distribution of residual stress in a glass sheet has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0007] In view of this, the object of the present invention is to provide a flat glass former with single-side overflow to solve the technical problem of uneven residual stress distribution in flat glass produced by existing double-side overflow formers.

[0008] The technical solution adopted by the present invention is: a flat glass former with single-side overflow, comprising:

[0009] seat body;

[0010] A material receiving hole, which is formed at one lateral end of the base body and extends in the vertical direction;

[0011] An overflow groove, the overflow groove is formed at the other lateral end of the seat body, and the overflow groove extends along the longitudinal direction;

[0012] An overflow rib, the overflow rib being formed at the other lateral end of the seat body, the two overflow ribs being located one-to-one at the longitudinal ends of the overflow groove and extending vertically;

[0013] A connecting flow channel, wherein the connecting flow channel is formed inside the seat body, and the connecting flow channel comprises a bend zone, a transition zone and an expansion zone arranged in sequence along the transverse direction, wherein the top of the bend zone is connected to the bottom of the material receiving hole, the small diameter end of the transition zone is connected to the bottom of the bend zone, the large diameter end of the transition zone is connected to the bottom of the expansion zone, and the top of the expansion zone extends obliquely upward and is connected to the overflow groove after penetrating the seat body;

[0014] The expansion zone includes an upper oblique edge, a right side edge, a lower oblique edge and a left side edge. Along the flow direction of the glass liquid, the longitudinal distance between the right side edge and the left side edge gradually increases, the transverse distance between the upper oblique edge and the lower oblique edge gradually increases, and the angle between the upper oblique edge and the horizontal plane is greater than the angle between the lower oblique edge and the horizontal plane.

[0015] Preferably, the central angle of the bend area is 90°.

[0016] Preferably, the top end of the bend pipe area is coaxially arranged with the material receiving hole, and the radial dimension of the material receiving hole is larger than the radial dimension of the bend pipe area.

[0017] Preferably, the transition zone is formed by four smooth curved surfaces connected end to end in sequence to form a ring, and the center line of the transition zone is arranged along the transverse direction.

[0018] Preferably, the horizontal cross-section of the expansion zone is an isosceles trapezoid.

[0019] The second object of the present invention is to provide a flat glass forming system, including the above-mentioned single-sided overflow flat glass former, a feeding pipe and an aerial forming device, wherein the feeding pipe is coaxially arranged above the material receiving hole, and the radial dimension of the feeding pipe is smaller than the radial dimension of the bending area, and the aerial forming device is arranged below the overflow rib.

[0020] Preferably, the aerial forming device comprises an aerial vertical calendering roll forming mechanism.

[0021] Preferably, the aerial forming device comprises an aerial vertical edge-drawing roller forming mechanism.

[0022] Beneficial effects of the present invention:

[0023] The present invention adopts a single-side overflow method, and the flow direction of the glass liquid in the connecting flow channel is the same as the overflow direction of the glass liquid, so that the glass liquid entering the receiving hole at the same time can overflow from the overflow groove at the same time, and the flow path and flow time experienced by each point on the cross section of the glass plate are the same, so that the residual stress of the glass plate is evenly distributed, thereby improving the molding quality of the flat glass; at the same time, the glass liquid overflows from one side of the former to form, and the glass liquid does not need to be fused, which can avoid crystallization of the glass liquid at the bottom of the former. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of a flat glass forming device with a single-side overflow according to the present invention;

[0025] Figure 2 A top view of a flat glass former with a single-side overflow according to the present invention;

[0026] Figure 3 It is a structural schematic diagram of a flat glass former with single-side overflow according to the present invention;

[0027] Figure 4 It is a cross-sectional structural diagram of a flat glass forming device with a single-side overflow according to the present invention;

[0028] Figure 5 for Figure 2 AA view in;

[0029] Figure 6 It is one of the structural schematic diagrams of the flat glass forming system of the present invention;

[0030] Figure 7 for Figure 6 Side view of

[0031] Figure 8 This is the second structural schematic diagram of the flat glass forming system of the present invention;

[0032] Fig. 9 for Figure 8 Side view of

[0033] Fig.10 This is the flow diagram of molten glass.

[0034] Description of reference numerals in the figures:

[0035] 100. Base body;

[0036] 200, material receiving hole;

[0037] 300, overflow tank;

[0038] 400, overflow rib;

[0039] 500, connecting flow channel; 510, elbow area; 520, transition area; 530, expansion area; 531, upper bevel; 532, right side; 533, lower bevel; 534, left side;

[0040] 600, feeding pipe;

[0041] 700, aerial forming device;

[0042] 800. Glass plate. DETAILED DESCRIPTION

[0043] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0047] After long-term research, the inventors found that: for the existing double-sided overflow flat glass former, after the high-temperature glass liquid flows into the overflow groove from one end of the seat body, the molten glass liquid overflows from both sides of the overflow groove, which makes the flow direction of the glass liquid in the overflow groove perpendicular to the overflow direction of the glass liquid, and in the overflow process, the glass liquid that enters the overflow groove first will be formed at the far end of the glass plate, and the glass liquid that enters the overflow groove later will be formed at the near end of the glass plate. In this way, the heat history of the far end of the glass in the transverse section of the formed glass plate is long, and the heat history of the near end of the glass plate is short (caused by the different lengths of the flow path of the glass liquid), and the distribution of the forming liquid flow is uneven, which ultimately leads to uneven residual stress distribution of the glass plate. At the same time, the glass liquid that enters the overflow groove overflows separately on both sides, increasing the contact surface area between the glass liquid and the wall of the overflow groove. Once the temperature of the glass liquid on both sides is different, the fusion effect is poor, and the uneven temperature distribution inside and outside the formed glass plate will also aggravate the uneven residual stress distribution of the glass plate.

[0048] Examples, such as Figure 1-Figure 5As shown, a single-side overflow flat glass former comprises: a base 100, a material receiving hole 200, an overflow groove 300, an overflow rib 400 and a connecting flow channel 500.

[0049] The material receiving hole 200 is formed at one lateral end of the base body 100 , and the material receiving hole 200 extends along the vertical direction.

[0050] The overflow groove 300 is formed at the other transverse end of the base body 100 , and the overflow groove 300 extends along the longitudinal direction.

[0051] The overflow rib 400 is formed at the other lateral end of the seat body 100 , and the two overflow ribs 400 are located at the longitudinal ends of the overflow groove 300 in a one-to-one correspondence and extend vertically.

[0052] The connecting flow channel 500 is formed inside the seat body 100, and the connecting flow channel 500 includes a bend zone 510, a transition zone 520 and an expansion zone 530 arranged in sequence along the transverse direction. The top of the bend zone 510 is connected to the bottom end of the material receiving hole 200, the small diameter end of the transition zone 520 is connected to the bottom end of the bend zone 510, and the large diameter end of the transition zone 520 is connected to the bottom end of the expansion zone 530. The top of the expansion zone 530 extends obliquely upward and is connected to the overflow groove 300 after passing through the seat body 100.

[0053] The expansion zone 530 includes an upper oblique edge 531, a right side edge 532, a lower oblique edge 533 and a left side edge 534. Along the flow direction of the glass liquid, the longitudinal distance between the right side edge 532 and the left side edge 534 gradually increases, and the transverse distance between the upper oblique edge 531 and the lower oblique edge 533 gradually increases, and the angle between the upper oblique edge 531 and the horizontal plane is greater than the angle between the lower oblique edge 533 and the horizontal plane.

[0054] The present invention adopts a single-side overflow method, and the flow direction of the glass liquid in the connecting flow channel 500 is the same as the overflow direction of the glass liquid, so that the glass liquid entering the receiving hole 200 at the same time can overflow from the overflow groove 300 at the same time, and the flow path and flow time experienced by each point on the cross section of the glass plate are the same, so that the residual stress of the glass plate is evenly distributed, and the molding quality of the flat glass is improved. At the same time, the glass liquid overflows from one side of the former to form, and the glass liquid does not need to be fused, which can avoid the crystallization phenomenon at the bottom of the former after the glass liquid overflows.

[0055] It should be noted that the lateral direction in the present invention refers to Figure 1 The X-axis direction in the vertical direction refers to Figure 1 The Y-axis direction in the vertical direction refers to Figure 1 The Z-axis direction.

[0056] Specific embodiment 1, as Figure 1-Figure 5As shown, a single-side overflow flat glass former comprises: a base 100, a material receiving hole 200, an overflow groove 300, an overflow rib 400 and a connecting flow channel 500.

[0057] The base body 100 is made of high temperature resistant material and is disposed along a transverse direction.

[0058] The material receiving hole 200 is formed at the left end of the base body 100 in the horizontal direction. The material receiving hole 200 is a circular hole and extends along the vertical direction.

[0059] The overflow groove 300 is formed at the right end of the base body 100 in the transverse direction, and the overflow groove 300 extends along the longitudinal direction.

[0060] The overflow rib 400 is formed at the right lateral end of the seat body 100 . There are two overflow ribs 400 , and the two overflow ribs 400 are located one-to-one at the two longitudinal ends of the overflow groove 300 . The overflow rib 400 extends vertically to limit the longitudinal position of the glass liquid overflowing from the overflow groove 300 .

[0061] The connecting channel 500 is formed inside the seat body 100 , and includes a bend area 510 , a transition area 520 , and an expansion area 530 sequentially arranged along the transverse direction.

[0062] The central angle of the bend area 510 is 90°, that is, the axial direction of the top end of the bend area 510 is along the vertical direction, and the axis of the bottom end of the bend area 510 is along the transverse direction. The top end of the bend area 510 is coaxially arranged and connected with the bottom end of the material receiving hole 200, and the radial dimension of the bend area 510 is smaller than the radial dimension of the material receiving hole 200.

[0063] The transition zone 520 is fixedly connected between the bend zone 510 and the expansion zone 530, and the left end of the transition zone 520 is a small diameter end, and the right end is a large diameter end, that is, the left end of the transition zone 520 is thin, and the right end of the transition zone 520 is thick. The small diameter end of the transition zone 520 is fixedly connected to the bottom end of the bend zone 510, and the large diameter end of the transition zone 520 is connected to the bottom end of the expansion zone 530.

[0064] Specifically, the transition zone 520 is formed into a ring shape by connecting four smooth curved surfaces end to end, and the center line of the transition zone 520 is arranged along the lateral direction.

[0065] The expansion zone 530 is tilted as a whole, and the top of the expansion zone 530 extends obliquely upward and penetrates the base body 100. The top of the expansion zone 530 is connected to the left end of the overflow groove 300 so that the glass liquid flows out of the base body 100 along the connecting flow channel 500 and overflows from the overflow groove 300 to the right.

[0066] The horizontal cross-section of the expansion zone 530 is an isosceles trapezoid, and the expansion zone 530 includes an upper oblique side 531, a right side 532, a lower oblique side 533 and a left side 534. Along the flow direction of the glass liquid, the longitudinal distance between the right side 532 and the left side 534 gradually increases, and the transverse distance between the upper oblique side 531 and the lower oblique side 533 gradually increases, and the angle between the upper oblique side 531 and the horizontal plane is greater than the angle between the lower oblique side 533 and the horizontal plane.

[0067] Specific embodiment 2, as Figure 6 and Figure 7 As shown, a flat glass forming system includes the above-mentioned single-side overflow flat glass former, a feeding pipe 600 and an aerial forming device 700, wherein the feeding pipe 600 is coaxially arranged above the material receiving hole 200, the bottom end of the feeding pipe 600 extends into the interior of the material receiving hole 200, and the radial dimension of the feeding pipe 600 is smaller than the radial dimension of the bending area 510; the aerial forming device 700 is an aerial vertical calendering roller forming mechanism, which is arranged below the overflow rib 400 and is used for calendering and cooling forming of flat glass.

[0068] like Fig.10 As shown, the liquid flow diagram shows that there is no backflow and stagnation when the glass liquid flows in the molding device, and the glass liquids entering the molding device at the same time can overflow from the overflow groove 300 at the same time.

[0069] Specific embodiment 3, as Figure 8 and Fig. 9 As shown, a flat glass forming system includes the above-mentioned single-side overflow flat glass former, a feeding pipe 600 and an aerial forming device 700, wherein the feeding pipe 600 is coaxially arranged above the material receiving hole 200, and the radial dimension of the feeding pipe 600 is smaller than the radial dimension of the bending area 510; the aerial forming device 700 is an aerial vertical edge drawing roller forming mechanism, which is arranged below the overflow rib 400 and is used for edge drawing and cooling forming of flat glass.

[0070] The working principle of the former of the present invention is as follows:

[0071] The flow direction of the molten glass in the former is the same as the overflow direction of the molten glass, so that the molten glass entering the former at the same time can overflow from the former at the same time, ensuring that the flow path and thermal history time experienced by each point on the cross section of the glass plate are the same. This not only ensures that the residual stress inside the glass plate is evenly distributed, but also the molten glass overflows from one side of the former to form, and does not need to be fused, which can avoid crystallization of the molten glass at the bottom of the former.

[0072] After the glass liquid enters the former, the glass liquid in contact with the seat body in the receiving hole and the connecting flow channel stays for a long time, and the probability of defects is high. Since the longitudinal spacing between the left and right sides of the expansion zone gradually increases along the flow direction of the glass liquid, and the lateral spacing between the upper and lower beveled edges of the expansion zone gradually increases, the glass liquid in contact with the seat body will gradually flow to the longitudinal sides of the connecting flow channel, and thus most of the glass liquid with a long residence time will be concentrated on the longitudinal sides of the glass plate. Most of the middle glass liquid has a concentrated time distribution in the former and is located in the middle of the glass plate after molding, and the residual stress is evenly distributed.

[0073] Compared with the prior art, this application has at least the following beneficial technical effects:

[0074] Improved glass quality: The single-side overflow down-draw method is more conducive to controlling the flow and temperature distribution of molten glass in terms of technology, thereby improving the uniformity and flatness of the glass.

[0075] Performance optimization: The produced glass can have better optical properties, thermal stability and mechanical strength to meet a wider range of application needs.

[0076] Adapt to different specifications: The single-side overflow down-pull method can more easily adapt to the production needs of glass of different specifications and thicknesses, thus improving the flexibility of production.

[0077] Easy to adjust and optimize: Since the process is relatively simple, it is easier to adjust and optimize production parameters to adapt to changes in market demand.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A flat glass former with one-side overflow, characterized in that: include: base(100); A material receiving hole (200), wherein the material receiving hole (200) is formed at one lateral end of the base body (100), and the material receiving hole (200) extends in the vertical direction; An overflow groove (300), wherein the overflow groove (300) is formed at the other lateral end of the seat body (100), and the overflow groove (300) extends in the longitudinal direction; An overflow rib (400), wherein the overflow rib (400) is formed at the other lateral end of the seat body (100), and the two overflow ribs (400) are located at the longitudinal ends of the overflow groove (300) in a one-to-one correspondence and extend vertically; A connecting flow channel (500), wherein the connecting flow channel (500) is formed inside the seat body (100), and the connecting flow channel (500) comprises a bend zone (510), a transition zone (520) and an expansion zone (530) arranged in sequence along the transverse direction, wherein the top end of the bend zone (510) is connected to the bottom end of the material receiving hole (200), the small diameter end of the transition zone (520) is connected to the bottom end of the bend zone (510), the large diameter end of the transition zone (520) is connected to the bottom end of the expansion zone (530), and the top end of the expansion zone (530) extends obliquely upward and is connected to the overflow groove (300) after passing through the seat body (100); The expansion zone (530) includes an upper oblique edge (531), a right side edge (532), a lower oblique edge (533) and a left side edge (534). Along the flow direction of the glass liquid, the longitudinal distance between the right side edge (532) and the left side edge (534) gradually increases, the transverse distance between the upper oblique edge (531) and the lower oblique edge (533) gradually increases, and the angle between the upper oblique edge (531) and the horizontal plane is greater than the angle between the lower oblique edge (533) and the horizontal plane.

2. A single-side overflow flat glass former according to claim 1, characterized in that: The central angle of the curved pipe area (510) is 90°.

3. A single-side overflow flat glass former according to claim 2, characterized in that: The top end of the curved pipe area (510) is coaxially arranged with the material receiving hole (200), and the radial dimension of the material receiving hole (200) is greater than the radial dimension of the curved pipe area (510).

4. A single-side overflow flat glass former according to claim 1, characterized in that: The transition zone (520) is formed by four smooth curved surfaces connected end to end in sequence to form a ring, and the center line of the transition zone (520) is arranged along the transverse direction.

5. A single-side overflow flat glass former according to claim 1, characterized in that: The horizontal cross-section of the expansion zone (530) is an isosceles trapezoid.

6. A flat glass forming system, comprising the flat glass former with one-side overflow according to any one of claims 1 to 5, characterized in that: It also includes a feeding pipe (600) and an aerial forming device (700), wherein the feeding pipe (600) is coaxially arranged above the material receiving hole (200), and the radial dimension of the feeding pipe (600) is smaller than the radial dimension of the bend area (510), and the aerial forming device (700) is arranged below the overflow rib (400).

7. A flat glass forming system according to claim 6, characterized in that: The aerial forming device (700) comprises an aerial vertical calendering roller forming mechanism.

8. A flat glass forming system according to claim 6, characterized in that: The aerial forming device (700) comprises an aerial vertical edge-drawing roller forming mechanism.

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